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937a200089
This is actually a fully functional build except: * All internal shared libraries are static linked to make sure there is no interference with ports (and to reduce build time). * It does not have the python/perl/etc plugin or API support. * By default, it installs as "svnlite" rather than "svn". * If WITH_SVN added in make.conf, you get "svn". * If WITHOUT_SVNLITE is in make.conf, this is completely disabled. To be absolutely clear, this is not intended for any use other than checking out freebsd source and committing, like we once did with cvs. It should be usable for small scale local repositories that don't need the python/perl plugin architecture.
1118 lines
38 KiB
C
1118 lines
38 KiB
C
/* Copyright 2002-2004 Justin Erenkrantz and Greg Stein
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SERF_H
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#define SERF_H
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/**
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* @file serf.h
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* @brief Main serf header file
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*/
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#include <apr.h>
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#include <apr_errno.h>
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#include <apr_allocator.h>
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#include <apr_pools.h>
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#include <apr_network_io.h>
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#include <apr_time.h>
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#include <apr_poll.h>
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#include <apr_uri.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Forward declare some structures */
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typedef struct serf_context_t serf_context_t;
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typedef struct serf_bucket_t serf_bucket_t;
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typedef struct serf_bucket_type_t serf_bucket_type_t;
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typedef struct serf_bucket_alloc_t serf_bucket_alloc_t;
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typedef struct serf_connection_t serf_connection_t;
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typedef struct serf_listener_t serf_listener_t;
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typedef struct serf_incoming_t serf_incoming_t;
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typedef struct serf_incoming_request_t serf_incoming_request_t;
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typedef struct serf_request_t serf_request_t;
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/**
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* @defgroup serf high-level constructs
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* @ingroup serf
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* @{
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*/
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/**
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* Serf-specific error codes
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*/
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#define SERF_ERROR_RANGE 100
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/* This code is for when this is the last response on this connection:
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* i.e. do not send any more requests on this connection or expect
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* any more responses.
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*/
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#define SERF_ERROR_CLOSING (APR_OS_START_USERERR + SERF_ERROR_RANGE + 1)
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/* This code is for when the connection terminated before the request
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* could be processed on the other side.
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*/
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#define SERF_ERROR_REQUEST_LOST (APR_OS_START_USERERR + SERF_ERROR_RANGE + 2)
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/* This code is for when the connection is blocked - we can not proceed
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* until something happens - generally due to SSL negotiation-like behavior
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* where a write() is blocked until a read() is processed.
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*/
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#define SERF_ERROR_WAIT_CONN (APR_OS_START_USERERR + SERF_ERROR_RANGE + 3)
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/* This code is for when something went wrong during deflating compressed
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* data e.g. a CRC error. */
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#define SERF_ERROR_DECOMPRESSION_FAILED (APR_OS_START_USERERR + \
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SERF_ERROR_RANGE + 4)
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/* This code is for when a response received from a http server is not in
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* http-compliant syntax. */
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#define SERF_ERROR_BAD_HTTP_RESPONSE (APR_OS_START_USERERR + \
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SERF_ERROR_RANGE + 5)
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/* The server sent less data than what was announced. */
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#define SERF_ERROR_TRUNCATED_HTTP_RESPONSE (APR_OS_START_USERERR + \
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SERF_ERROR_RANGE + 6)
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/* The proxy server returned an error while setting up the SSL tunnel. */
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#define SERF_ERROR_SSLTUNNEL_SETUP_FAILED (APR_OS_START_USERERR + \
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SERF_ERROR_RANGE + 7)
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/* The server unexpectedly closed the connection prematurely. */
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#define SERF_ERROR_ABORTED_CONNECTION (APR_OS_START_USERERR + \
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SERF_ERROR_RANGE + 8)
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/* SSL certificates related errors */
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#define SERF_ERROR_SSL_CERT_FAILED (APR_OS_START_USERERR + SERF_ERROR_RANGE + 70)
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/* SSL communications related errors */
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#define SERF_ERROR_SSL_COMM_FAILED (APR_OS_START_USERERR + SERF_ERROR_RANGE + 71)
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/* General authentication related errors */
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#define SERF_ERROR_AUTHN_FAILED (APR_OS_START_USERERR + SERF_ERROR_RANGE + 90)
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/* None of the available authn mechanisms for the request are supported */
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#define SERF_ERROR_AUTHN_NOT_SUPPORTED (APR_OS_START_USERERR + SERF_ERROR_RANGE + 91)
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/* Authn was requested by the server but the header lacked some attribute */
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#define SERF_ERROR_AUTHN_MISSING_ATTRIBUTE (APR_OS_START_USERERR + SERF_ERROR_RANGE + 92)
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/* Authentication handler initialization related errors */
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#define SERF_ERROR_AUTHN_INITALIZATION_FAILED (APR_OS_START_USERERR +\
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SERF_ERROR_RANGE + 93)
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/* This macro groups errors potentially raised when reading a http response. */
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#define SERF_BAD_RESPONSE_ERROR(status) ((status) \
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&& ((SERF_ERROR_DECOMPRESSION_FAILED == (status)) \
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||(SERF_ERROR_BAD_HTTP_RESPONSE == (status)) \
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||(SERF_ERROR_TRUNCATED_HTTP_RESPONSE == (status))))
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/**
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* Return a string that describes the specified error code.
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*
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* If the error code is not one of the above Serf error codes, then
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* NULL will be returned.
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*
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* Note regarding lifetime: the string is a statically-allocated constant
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*/
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const char *serf_error_string(apr_status_t errcode);
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/**
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* Create a new context for serf operations.
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*
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* A serf context defines a control loop which processes multiple
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* connections simultaneously.
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*
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* The context will be allocated within @a pool.
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*/
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serf_context_t *serf_context_create(
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apr_pool_t *pool);
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/**
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* Callback function. Add a socket to the externally managed poll set.
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*
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* Both @a pfd and @a serf_baton should be used when calling serf_event_trigger
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* later.
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*/
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typedef apr_status_t (*serf_socket_add_t)(
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void *user_baton,
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apr_pollfd_t *pfd,
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void *serf_baton);
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/**
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* Callback function. Remove the socket, identified by both @a pfd and
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* @a serf_baton from the externally managed poll set.
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*/
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typedef apr_status_t (*serf_socket_remove_t)(
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void *user_baton,
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apr_pollfd_t *pfd,
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void *serf_baton);
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/* Create a new context for serf operations.
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*
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* Use this function to make serf not use its internal control loop, but
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* instead rely on an external event loop. Serf will use the @a addf and @a rmf
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* callbacks to notify of any event on a connection. The @a user_baton will be
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* passed through the addf and rmf callbacks.
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*
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* The context will be allocated within @a pool.
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*/
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serf_context_t *serf_context_create_ex(
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void *user_baton,
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serf_socket_add_t addf,
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serf_socket_remove_t rmf,
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apr_pool_t *pool);
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/**
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* Make serf process events on a connection, identified by both @a pfd and
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* @a serf_baton.
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*
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* Any outbound data is delivered, and incoming data is made available to
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* the associated response handlers and their buckets.
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*
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* If any data is processed (incoming or outgoing), then this function will
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* return with APR_SUCCESS.
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*/
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apr_status_t serf_event_trigger(
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serf_context_t *s,
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void *serf_baton,
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const apr_pollfd_t *pfd);
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/** @see serf_context_run should not block at all. */
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#define SERF_DURATION_NOBLOCK 0
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/** @see serf_context_run should run for (nearly) "forever". */
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#define SERF_DURATION_FOREVER 2000000000 /* approx 1^31 */
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/**
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* Run the main networking control loop.
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*
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* The set of connections defined by the serf context @a ctx are processed.
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* Any outbound data is delivered, and incoming data is made available to
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* the associated response handlers and their buckets. This function will
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* block on the network for no longer than @a duration microseconds.
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*
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* If any data is processed (incoming or outgoing), then this function will
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* return with APR_SUCCESS. Typically, the caller will just want to call it
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* again to continue processing data.
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*
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* If no activity occurs within the specified timeout duration, then
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* APR_TIMEUP is returned.
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*
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* All temporary allocations will be made in @a pool.
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*/
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apr_status_t serf_context_run(
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serf_context_t *ctx,
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apr_short_interval_time_t duration,
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apr_pool_t *pool);
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apr_status_t serf_context_prerun(
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serf_context_t *ctx);
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/**
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* Callback function for progress information. @a progress indicates cumulative
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* number of bytes read or written, for the whole context.
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*/
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typedef void (*serf_progress_t)(
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void *progress_baton,
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apr_off_t read,
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apr_off_t write);
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/**
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* Sets the progress callback function. @a progress_func will be called every
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* time bytes are read of or written on a socket.
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*/
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void serf_context_set_progress_cb(
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serf_context_t *ctx,
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const serf_progress_t progress_func,
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void *progress_baton);
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/** @} */
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/**
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* @defgroup serf connections and requests
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* @ingroup serf
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* @{
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*/
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/**
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* When a connection is established, the application needs to wrap some
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* buckets around @a skt to enable serf to process incoming responses. This
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* is the control point for assembling connection-level processing logic
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* around the given socket.
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*
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* The @a setup_baton is the baton established at connection creation time.
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*
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* This callback corresponds to reading from the server. Since this is an
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* on-demand activity, we use a callback. The corresponding write operation
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* is based on the @see serf_request_deliver function, where the application
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* can assemble the appropriate bucket(s) before delivery.
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*
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* The returned bucket should live at least as long as the connection itself.
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* It is assumed that an appropriate allocator is passed in @a setup_baton.
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* ### we may want to create a connection-level allocator and pass that
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* ### along. however, that allocator would *only* be used for this
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* ### callback. it may be wasteful to create a per-conn allocator, so this
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* ### baton-based, app-responsible form might be best.
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*
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* Responsibility for the buckets is passed to the serf library. They will be
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* destroyed when the connection is closed.
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*
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* All temporary allocations should be made in @a pool.
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*/
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typedef apr_status_t (*serf_connection_setup_t)(
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apr_socket_t *skt,
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serf_bucket_t **read_bkt,
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serf_bucket_t **write_bkt,
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void *setup_baton,
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apr_pool_t *pool);
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/**
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* ### need to update docco w.r.t socket. became "stream" recently.
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* ### the stream does not have a barrier, this callback should generally
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* ### add a barrier around the stream before incorporating it into a
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* ### response bucket stack.
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* ### should serf add the barrier automatically to protect its data
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* ### structure? i.e. the passed bucket becomes owned rather than
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* ### borrowed. that might suit overall semantics better.
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* Accept an incoming response for @a request, and its @a socket. A bucket
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* for the response should be constructed and returned. This is the control
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* point for assembling the appropriate wrapper buckets around the socket to
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* enable processing of the incoming response.
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*
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* The @a acceptor_baton is the baton provided when the specified request
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* was created.
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*
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* The request's pool and bucket allocator should be used for any allocations
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* that need to live for the duration of the response. Care should be taken
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* to bound the amount of memory stored in this pool -- to ensure that
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* allocations are not proportional to the amount of data in the response.
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*
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* Responsibility for the bucket is passed to the serf library. It will be
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* destroyed when the response has been fully read (the bucket returns an
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* APR_EOF status from its read functions).
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*
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* All temporary allocations should be made in @a pool.
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*/
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/* ### do we need to return an error? */
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typedef serf_bucket_t * (*serf_response_acceptor_t)(
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serf_request_t *request,
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serf_bucket_t *stream,
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void *acceptor_baton,
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apr_pool_t *pool);
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/**
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* Notification callback for when a connection closes.
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*
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* This callback is used to inform an application that the @a conn
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* connection has been (abnormally) closed. The @a closed_baton is the
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* baton provided when the connection was first opened. The reason for
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* closure is given in @a why, and will be APR_SUCCESS if the application
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* requested closure (by clearing the pool used to allocate this
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* connection or calling serf_connection_close).
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*
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* All temporary allocations should be made in @a pool.
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*/
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typedef void (*serf_connection_closed_t)(
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serf_connection_t *conn,
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void *closed_baton,
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apr_status_t why,
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apr_pool_t *pool);
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/**
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* Response data has arrived and should be processed.
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*
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* Whenever response data for @a request arrives (initially, or continued data
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* arrival), this handler is invoked. The response data is available in the
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* @a response bucket. The @a handler_baton is passed along from the baton
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* provided by the request setup callback (@see serf_request_setup_t).
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*
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* The handler MUST process data from the @a response bucket until the
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* bucket's read function states it would block (see APR_STATUS_IS_EAGAIN).
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* The handler is invoked only when new data arrives. If no further data
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* arrives, and the handler does not process all available data, then the
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* system can result in a deadlock around the unprocessed, but read, data.
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*
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* The handler should return APR_EOF when the response has been fully read.
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* If calling the handler again would block, APR_EAGAIN should be returned.
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* If the handler should be invoked again, simply return APR_SUCCESS.
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*
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* Note: if the connection closed (at the request of the application, or
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* because of an (abnormal) termination) while a request is being delivered,
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* or before a response arrives, then @a response will be NULL. This is the
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* signal that the request was not delivered properly, and no further
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* response should be expected (this callback will not be invoked again).
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* If a request is injected into the connection (during this callback's
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* execution, or otherwise), then the connection will be reopened.
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*
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* All temporary allocations should be made in @a pool.
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*/
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typedef apr_status_t (*serf_response_handler_t)(
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serf_request_t *request,
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serf_bucket_t *response,
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void *handler_baton,
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apr_pool_t *pool);
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/**
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* Callback function to be implemented by the application, so that serf
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* can handle server and proxy authentication.
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* code = 401 (server) or 407 (proxy).
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* baton = the baton passed to serf_context_run.
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* authn_type = one of "Basic", "Digest".
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*/
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typedef apr_status_t (*serf_credentials_callback_t)(
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char **username,
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char **password,
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serf_request_t *request, void *baton,
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int code, const char *authn_type,
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const char *realm,
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apr_pool_t *pool);
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/**
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* Create a new connection associated with the @a ctx serf context.
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*
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* If no proxy server is configured, a connection will be created to
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* (eventually) connect to the address specified by @a address. The address must
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* live at least as long as @a pool (thus, as long as the connection object).
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* If a proxy server is configured, @address will be ignored.
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*
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* The connection object will be allocated within @a pool. Clearing or
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* destroying this pool will close the connection, and terminate any
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* outstanding requests or responses.
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*
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* When the connection is closed (upon request or because of an error),
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* then the @a closed callback is invoked, and @a closed_baton is passed.
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*
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* ### doc on setup(_baton). tweak below comment re: acceptor.
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* NULL may be passed for @a acceptor and @a closed; default implementations
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* will be used.
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*
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* Note: the connection is not made immediately. It will be opened on
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* the next call to @see serf_context_run.
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*/
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serf_connection_t *serf_connection_create(
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serf_context_t *ctx,
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apr_sockaddr_t *address,
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serf_connection_setup_t setup,
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void *setup_baton,
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serf_connection_closed_t closed,
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void *closed_baton,
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apr_pool_t *pool);
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/**
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* Create a new connection associated with the @a ctx serf context.
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*
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* A connection will be created to (eventually) connect to the address
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* specified by @a address. The address must live at least as long as
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* @a pool (thus, as long as the connection object).
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*
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* The host address will be looked up based on the hostname in @a host_info.
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*
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* The connection object will be allocated within @a pool. Clearing or
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* destroying this pool will close the connection, and terminate any
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* outstanding requests or responses.
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*
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* When the connection is closed (upon request or because of an error),
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* then the @a closed callback is invoked, and @a closed_baton is passed.
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*
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* ### doc on setup(_baton). tweak below comment re: acceptor.
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* NULL may be passed for @a acceptor and @a closed; default implementations
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* will be used.
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*
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* Note: the connection is not made immediately. It will be opened on
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* the next call to @see serf_context_run.
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*/
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apr_status_t serf_connection_create2(
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serf_connection_t **conn,
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serf_context_t *ctx,
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apr_uri_t host_info,
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serf_connection_setup_t setup,
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void *setup_baton,
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serf_connection_closed_t closed,
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void *closed_baton,
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apr_pool_t *pool);
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typedef apr_status_t (*serf_accept_client_t)(
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serf_context_t *ctx,
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serf_listener_t *l,
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void *accept_baton,
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apr_socket_t *insock,
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apr_pool_t *pool);
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apr_status_t serf_listener_create(
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serf_listener_t **listener,
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serf_context_t *ctx,
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const char *host,
|
|
apr_uint16_t port,
|
|
void *accept_baton,
|
|
serf_accept_client_t accept_func,
|
|
apr_pool_t *pool);
|
|
|
|
typedef apr_status_t (*serf_incoming_request_cb_t)(
|
|
serf_context_t *ctx,
|
|
serf_incoming_request_t *req,
|
|
void *request_baton,
|
|
apr_pool_t *pool);
|
|
|
|
apr_status_t serf_incoming_create(
|
|
serf_incoming_t **client,
|
|
serf_context_t *ctx,
|
|
apr_socket_t *insock,
|
|
void *request_baton,
|
|
serf_incoming_request_cb_t request,
|
|
apr_pool_t *pool);
|
|
|
|
|
|
|
|
|
|
/**
|
|
* Reset the connection, but re-open the socket again.
|
|
*/
|
|
apr_status_t serf_connection_reset(
|
|
serf_connection_t *conn);
|
|
|
|
/**
|
|
* Close the connection associated with @a conn and cancel all pending requests.
|
|
*
|
|
* The closed callback passed to serf_connection_create() will be invoked
|
|
* with APR_SUCCESS.
|
|
*/
|
|
apr_status_t serf_connection_close(
|
|
serf_connection_t *conn);
|
|
|
|
/**
|
|
* Sets the maximum number of outstanding requests @a max_requests on the
|
|
* connection @a conn. Setting max_requests to 0 means unlimited (the default).
|
|
* Ex.: setting max_requests to 1 means a request is sent when a response on the
|
|
* previous request was received and handled.
|
|
*/
|
|
void serf_connection_set_max_outstanding_requests(
|
|
serf_connection_t *conn,
|
|
unsigned int max_requests);
|
|
|
|
void serf_connection_set_async_responses(
|
|
serf_connection_t *conn,
|
|
serf_response_acceptor_t acceptor,
|
|
void *acceptor_baton,
|
|
serf_response_handler_t handler,
|
|
void *handler_baton);
|
|
|
|
/**
|
|
* Setup the @a request for delivery on its connection.
|
|
*
|
|
* Right before this is invoked, @a pool will be built within the
|
|
* connection's pool for the request to use. The associated response will
|
|
* be allocated within that subpool. An associated bucket allocator will
|
|
* be built. These items may be fetched from the request object through
|
|
* @see serf_request_get_pool or @see serf_request_get_alloc.
|
|
*
|
|
* The content of the request is specified by the @a req_bkt bucket. When
|
|
* a response arrives, the @a acceptor callback will be invoked (along with
|
|
* the @a acceptor_baton) to produce a response bucket. That bucket will then
|
|
* be passed to @a handler, along with the @a handler_baton.
|
|
*
|
|
* The responsibility for the request bucket is passed to the request
|
|
* object. When the request is done with the bucket, it will be destroyed.
|
|
*/
|
|
typedef apr_status_t (*serf_request_setup_t)(
|
|
serf_request_t *request,
|
|
void *setup_baton,
|
|
serf_bucket_t **req_bkt,
|
|
serf_response_acceptor_t *acceptor,
|
|
void **acceptor_baton,
|
|
serf_response_handler_t *handler,
|
|
void **handler_baton,
|
|
apr_pool_t *pool);
|
|
|
|
/**
|
|
* Construct a request object for the @a conn connection.
|
|
*
|
|
* When it is time to deliver the request, the @a setup callback will
|
|
* be invoked with the @a setup_baton passed into it to complete the
|
|
* construction of the request object.
|
|
*
|
|
* If the request has not (yet) been delivered, then it may be canceled
|
|
* with @see serf_request_cancel.
|
|
*
|
|
* Invoking any calls other than @see serf_request_cancel before the setup
|
|
* callback executes is not supported.
|
|
*/
|
|
serf_request_t *serf_connection_request_create(
|
|
serf_connection_t *conn,
|
|
serf_request_setup_t setup,
|
|
void *setup_baton);
|
|
|
|
/**
|
|
* Construct a request object for the @a conn connection, add it in the
|
|
* list as the next to-be-written request before all unwritten requests.
|
|
*
|
|
* When it is time to deliver the request, the @a setup callback will
|
|
* be invoked with the @a setup_baton passed into it to complete the
|
|
* construction of the request object.
|
|
*
|
|
* If the request has not (yet) been delivered, then it may be canceled
|
|
* with @see serf_request_cancel.
|
|
*
|
|
* Invoking any calls other than @see serf_request_cancel before the setup
|
|
* callback executes is not supported.
|
|
*/
|
|
serf_request_t *serf_connection_priority_request_create(
|
|
serf_connection_t *conn,
|
|
serf_request_setup_t setup,
|
|
void *setup_baton);
|
|
|
|
|
|
/** Returns detected network latency for the @a conn connection. Negative
|
|
* value means that latency is unknwon.
|
|
*/
|
|
apr_interval_time_t serf_connection_get_latency(serf_connection_t *conn);
|
|
|
|
/** Check if a @a request has been completely written.
|
|
*
|
|
* Returns APR_SUCCESS if the request was written completely on the connection.
|
|
* Returns APR_EBUSY if the request is not yet or partially written.
|
|
*/
|
|
apr_status_t serf_request_is_written(
|
|
serf_request_t *request);
|
|
|
|
/**
|
|
* Cancel the request specified by the @a request object.
|
|
*
|
|
* If the request has been scheduled for delivery, then its response
|
|
* handler will be run, passing NULL for the response bucket.
|
|
*
|
|
* If the request has already been (partially or fully) delivered, then
|
|
* APR_EBUSY is returned and the request is *NOT* canceled. To properly
|
|
* cancel the request, the connection must be closed (by clearing or
|
|
* destroying its associated pool).
|
|
*/
|
|
apr_status_t serf_request_cancel(
|
|
serf_request_t *request);
|
|
|
|
/**
|
|
* Return the pool associated with @a request.
|
|
*
|
|
* WARNING: be very careful about the kinds of things placed into this
|
|
* pool. In particular, all allocation should be bounded in size, rather
|
|
* than proportional to any data stream.
|
|
*/
|
|
apr_pool_t *serf_request_get_pool(
|
|
const serf_request_t *request);
|
|
|
|
/**
|
|
* Return the bucket allocator associated with @a request.
|
|
*/
|
|
serf_bucket_alloc_t *serf_request_get_alloc(
|
|
const serf_request_t *request);
|
|
|
|
/**
|
|
* Return the connection associated with @a request.
|
|
*/
|
|
serf_connection_t *serf_request_get_conn(
|
|
const serf_request_t *request);
|
|
|
|
/**
|
|
* Update the @a handler and @a handler_baton for this @a request.
|
|
*
|
|
* This can be called after the request has started processing -
|
|
* subsequent data will be delivered to this new handler.
|
|
*/
|
|
void serf_request_set_handler(
|
|
serf_request_t *request,
|
|
const serf_response_handler_t handler,
|
|
const void **handler_baton);
|
|
|
|
/**
|
|
* Configure proxy server settings, to be used by all connections associated
|
|
* with the @a ctx serf context.
|
|
*
|
|
* The next connection will be created to connect to the proxy server
|
|
* specified by @a address. The address must live at least as long as the
|
|
* serf context.
|
|
*/
|
|
void serf_config_proxy(
|
|
serf_context_t *ctx,
|
|
apr_sockaddr_t *address);
|
|
|
|
/* Supported authentication types. */
|
|
#define SERF_AUTHN_NONE 0x00
|
|
#define SERF_AUTHN_BASIC 0x01
|
|
#define SERF_AUTHN_DIGEST 0x02
|
|
#define SERF_AUTHN_NTLM 0x04
|
|
#define SERF_AUTHN_NEGOTIATE 0x08
|
|
#define SERF_AUTHN_ALL 0xFF
|
|
|
|
/**
|
|
* Define the authentication handlers that serf will try on incoming requests.
|
|
*/
|
|
void serf_config_authn_types(
|
|
serf_context_t *ctx,
|
|
int authn_types);
|
|
|
|
/**
|
|
* Set the credentials callback handler.
|
|
*/
|
|
void serf_config_credentials_callback(
|
|
serf_context_t *ctx,
|
|
serf_credentials_callback_t cred_cb);
|
|
|
|
/* ### maybe some connection control functions for flood? */
|
|
|
|
/*** Special bucket creation functions ***/
|
|
|
|
/**
|
|
* Create a bucket of type 'socket bucket'.
|
|
* This is basically a wrapper around @a serf_bucket_socket_create, which
|
|
* initializes the bucket using connection and/or context specific settings.
|
|
*/
|
|
serf_bucket_t *serf_context_bucket_socket_create(
|
|
serf_context_t *ctx,
|
|
apr_socket_t *skt,
|
|
serf_bucket_alloc_t *allocator);
|
|
|
|
/**
|
|
* Create a bucket of type 'request bucket'.
|
|
* This is basically a wrapper around @a serf_bucket_request_create, which
|
|
* initializes the bucket using request, connection and/or context specific
|
|
* settings.
|
|
*
|
|
* This function will set following header(s):
|
|
* - Host: if the connection was created with @a serf_connection_create2.
|
|
*/
|
|
serf_bucket_t *serf_request_bucket_request_create(
|
|
serf_request_t *request,
|
|
const char *method,
|
|
const char *uri,
|
|
serf_bucket_t *body,
|
|
serf_bucket_alloc_t *allocator);
|
|
|
|
/** @} */
|
|
|
|
|
|
/**
|
|
* @defgroup serf buckets
|
|
* @ingroup serf
|
|
* @{
|
|
*/
|
|
|
|
/** Pass as REQUESTED to the read function of a bucket to read, consume,
|
|
* and return all available data.
|
|
*/
|
|
#define SERF_READ_ALL_AVAIL ((apr_size_t)-1)
|
|
|
|
/** Acceptable newline types for bucket->readline(). */
|
|
#define SERF_NEWLINE_CR 0x0001
|
|
#define SERF_NEWLINE_CRLF 0x0002
|
|
#define SERF_NEWLINE_LF 0x0004
|
|
#define SERF_NEWLINE_ANY 0x0007
|
|
|
|
/** Used to indicate that a newline is not present in the data buffer. */
|
|
/* ### should we make this zero? */
|
|
#define SERF_NEWLINE_NONE 0x0008
|
|
|
|
/** Used to indicate that a CR was found at the end of a buffer, and CRLF
|
|
* was acceptable. It may be that the LF is present, but it needs to be
|
|
* read first.
|
|
*
|
|
* Note: an alternative to using this symbol would be for callers to see
|
|
* the SERF_NEWLINE_CR return value, and know that some "end of buffer" was
|
|
* reached. While this works well for @see serf_util_readline, it does not
|
|
* necessary work as well for buckets (there is no obvious "end of buffer",
|
|
* although there is an "end of bucket"). The other problem with that
|
|
* alternative is that developers might miss the condition. This symbol
|
|
* calls out the possibility and ensures that callers will watch for it.
|
|
*/
|
|
#define SERF_NEWLINE_CRLF_SPLIT 0x0010
|
|
|
|
|
|
struct serf_bucket_type_t {
|
|
|
|
/** name of this bucket type */
|
|
const char *name;
|
|
|
|
/**
|
|
* Read (and consume) up to @a requested bytes from @a bucket.
|
|
*
|
|
* A pointer to the data will be returned in @a data, and its length
|
|
* is specified by @a len.
|
|
*
|
|
* The data will exist until one of two conditions occur:
|
|
*
|
|
* 1) this bucket is destroyed
|
|
* 2) another call to any read function or to peek()
|
|
*
|
|
* If an application needs the data to exist for a longer duration,
|
|
* then it must make a copy.
|
|
*/
|
|
apr_status_t (*read)(serf_bucket_t *bucket, apr_size_t requested,
|
|
const char **data, apr_size_t *len);
|
|
|
|
/**
|
|
* Read (and consume) a line of data from @a bucket.
|
|
*
|
|
* The acceptable forms of a newline are given by @a acceptable, and
|
|
* the type found is returned in @a found. If a newline is not present
|
|
* in the returned data, then SERF_NEWLINE_NONE is stored into @a found.
|
|
*
|
|
* A pointer to the data is returned in @a data, and its length is
|
|
* specified by @a len. The data will include the newline, if present.
|
|
*
|
|
* Note that there is no way to limit the amount of data returned
|
|
* by this function.
|
|
*
|
|
* The lifetime of the data is the same as that of the @see read
|
|
* function above.
|
|
*/
|
|
apr_status_t (*readline)(serf_bucket_t *bucket, int acceptable,
|
|
int *found,
|
|
const char **data, apr_size_t *len);
|
|
|
|
/**
|
|
* Read a set of pointer/length pairs from the bucket.
|
|
*
|
|
* The size of the @a vecs array is specified by @a vecs_size. The
|
|
* bucket should fill in elements of the array, and return the number
|
|
* used in @a vecs_used.
|
|
*
|
|
* Each element of @a vecs should specify a pointer to a block of
|
|
* data and a length of that data.
|
|
*
|
|
* The total length of all data elements should not exceed the
|
|
* amount specified in @a requested.
|
|
*
|
|
* The lifetime of the data is the same as that of the @see read
|
|
* function above.
|
|
*/
|
|
apr_status_t (*read_iovec)(serf_bucket_t *bucket, apr_size_t requested,
|
|
int vecs_size, struct iovec *vecs,
|
|
int *vecs_used);
|
|
|
|
/**
|
|
* Read data from the bucket in a form suitable for apr_socket_sendfile()
|
|
*
|
|
* On input, hdtr->numheaders and hdtr->numtrailers specify the size
|
|
* of the hdtr->headers and hdtr->trailers arrays, respectively. The
|
|
* bucket should fill in the headers and trailers, up to the specified
|
|
* limits, and set numheaders and numtrailers to the number of iovecs
|
|
* filled in for each item.
|
|
*
|
|
* @a file should be filled in with a file that can be read. If a file
|
|
* is not available or appropriate, then NULL should be stored. The
|
|
* file offset for the data should be stored in @a offset, and the
|
|
* length of that data should be stored in @a len. If a file is not
|
|
* returned, then @a offset and @a len should be ignored.
|
|
*
|
|
* The file position is not required to correspond to @a offset, and
|
|
* the caller may manipulate it at will.
|
|
*
|
|
* The total length of all data elements, and the portion of the
|
|
* file should not exceed the amount specified in @a requested.
|
|
*
|
|
* The lifetime of the data is the same as that of the @see read
|
|
* function above.
|
|
*/
|
|
apr_status_t (*read_for_sendfile)(serf_bucket_t *bucket,
|
|
apr_size_t requested, apr_hdtr_t *hdtr,
|
|
apr_file_t **file, apr_off_t *offset,
|
|
apr_size_t *len);
|
|
|
|
/**
|
|
* Look within @a bucket for a bucket of the given @a type. The bucket
|
|
* must be the "initial" data because it will be consumed by this
|
|
* function. If the given bucket type is available, then read and consume
|
|
* it, and return it to the caller.
|
|
*
|
|
* This function is usually used by readers that have custom handling
|
|
* for specific bucket types (e.g. looking for a file bucket to pass
|
|
* to apr_socket_sendfile).
|
|
*
|
|
* If a bucket of the given type is not found, then NULL is returned.
|
|
*
|
|
* The returned bucket becomes the responsibility of the caller. When
|
|
* the caller is done with the bucket, it should be destroyed.
|
|
*/
|
|
serf_bucket_t * (*read_bucket)(serf_bucket_t *bucket,
|
|
const serf_bucket_type_t *type);
|
|
|
|
/**
|
|
* Peek, but don't consume, the data in @a bucket.
|
|
*
|
|
* Since this function is non-destructive, the implicit read size is
|
|
* SERF_READ_ALL_AVAIL. The caller can then use whatever amount is
|
|
* appropriate.
|
|
*
|
|
* The @a data parameter will point to the data, and @a len will
|
|
* specify how much data is available. The lifetime of the data follows
|
|
* the same rules as the @see read function above.
|
|
*
|
|
* Note: if the peek does not return enough data for your particular
|
|
* use, then you must read/consume some first, then peek again.
|
|
*
|
|
* If the returned data represents all available data, then APR_EOF
|
|
* will be returned. Since this function does not consume data, it
|
|
* can return the same data repeatedly rather than blocking; thus,
|
|
* APR_EAGAIN will never be returned.
|
|
*/
|
|
apr_status_t (*peek)(serf_bucket_t *bucket,
|
|
const char **data, apr_size_t *len);
|
|
|
|
/**
|
|
* Destroy @a bucket, along with any associated resources.
|
|
*/
|
|
void (*destroy)(serf_bucket_t *bucket);
|
|
|
|
/* ### apr buckets have 'copy', 'split', and 'setaside' functions.
|
|
### not sure whether those will be needed in this bucket model.
|
|
*/
|
|
};
|
|
|
|
/**
|
|
* Should the use and lifecycle of buckets be tracked?
|
|
*
|
|
* When tracking, the system will ensure several semantic requirements
|
|
* of bucket use:
|
|
*
|
|
* - if a bucket returns APR_EAGAIN, one of its read functions should
|
|
* not be called immediately. the context's run loop should be called.
|
|
* ### and for APR_EOF, too?
|
|
* - all buckets must be drained of input before returning to the
|
|
* context's run loop.
|
|
* - buckets should not be destroyed before they return APR_EOF unless
|
|
* the connection is closed for some reason.
|
|
*
|
|
* Undefine this symbol to avoid the tracking (and a performance gain).
|
|
*
|
|
* ### we may want to examine when/how we provide this. should it always
|
|
* ### be compiled in? and apps select it before including this header?
|
|
*/
|
|
/* #define SERF_DEBUG_BUCKET_USE */
|
|
|
|
|
|
/* Internal macros for tracking bucket use. */
|
|
#ifdef SERF_DEBUG_BUCKET_USE
|
|
#define SERF__RECREAD(b,s) serf_debug__record_read(b,s)
|
|
#else
|
|
#define SERF__RECREAD(b,s) (s)
|
|
#endif
|
|
|
|
#define serf_bucket_read(b,r,d,l) SERF__RECREAD(b, (b)->type->read(b,r,d,l))
|
|
#define serf_bucket_readline(b,a,f,d,l) \
|
|
SERF__RECREAD(b, (b)->type->readline(b,a,f,d,l))
|
|
#define serf_bucket_read_iovec(b,r,s,v,u) \
|
|
SERF__RECREAD(b, (b)->type->read_iovec(b,r,s,v,u))
|
|
#define serf_bucket_read_for_sendfile(b,r,h,f,o,l) \
|
|
SERF__RECREAD(b, (b)->type->read_for_sendfile(b,r,h,f,o,l))
|
|
#define serf_bucket_read_bucket(b,t) ((b)->type->read_bucket(b,t))
|
|
#define serf_bucket_peek(b,d,l) ((b)->type->peek(b,d,l))
|
|
#define serf_bucket_destroy(b) ((b)->type->destroy(b))
|
|
|
|
/**
|
|
* Check whether a real error occurred. Note that bucket read functions
|
|
* can return EOF and EAGAIN as part of their "normal" operation, so they
|
|
* should not be considered an error.
|
|
*/
|
|
#define SERF_BUCKET_READ_ERROR(status) ((status) \
|
|
&& !APR_STATUS_IS_EOF(status) \
|
|
&& !APR_STATUS_IS_EAGAIN(status) \
|
|
&& (SERF_ERROR_WAIT_CONN != status))
|
|
|
|
|
|
struct serf_bucket_t {
|
|
|
|
/** the type of this bucket */
|
|
const serf_bucket_type_t *type;
|
|
|
|
/** bucket-private data */
|
|
void *data;
|
|
|
|
/** the allocator used for this bucket (needed at destroy time) */
|
|
serf_bucket_alloc_t *allocator;
|
|
};
|
|
|
|
|
|
/**
|
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* Generic macro to construct "is TYPE" macros.
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*/
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#define SERF_BUCKET_CHECK(b, btype) ((b)->type == &serf_bucket_type_ ## btype)
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/**
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* Notification callback for a block that was not returned to the bucket
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* allocator when its pool was destroyed.
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*
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* The block of memory is given by @a block. The baton provided when the
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* allocator was constructed is passed as @a unfreed_baton.
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*/
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typedef void (*serf_unfreed_func_t)(
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void *unfreed_baton,
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void *block);
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/**
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* Create a new allocator for buckets.
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*
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* All buckets are associated with a serf bucket allocator. This allocator
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* will be created within @a pool and will be destroyed when that pool is
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* cleared or destroyed.
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*
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* When the allocator is destroyed, if any allocations were not explicitly
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* returned (by calling serf_bucket_mem_free), then the @a unfreed callback
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* will be invoked for each block. @a unfreed_baton will be passed to the
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* callback.
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*
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* If @a unfreed is NULL, then the library will invoke the abort() stdlib
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* call. Any failure to return memory is a bug in the application, and an
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* abort can assist with determining what kinds of memory were not freed.
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*/
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serf_bucket_alloc_t *serf_bucket_allocator_create(
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apr_pool_t *pool,
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serf_unfreed_func_t unfreed,
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void *unfreed_baton);
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/**
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* Return the pool that was used for this @a allocator.
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*
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* WARNING: the use of this pool for allocations requires a very
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* detailed understanding of pool behaviors, the bucket system,
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* and knowledge of the bucket's use within the overall pattern
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* of request/response behavior.
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*
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* See design-guide.txt for more information about pool usage.
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*/
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apr_pool_t *serf_bucket_allocator_get_pool(
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const serf_bucket_alloc_t *allocator);
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/**
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* Utility structure for reading a complete line of input from a bucket.
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*
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* Since it is entirely possible for a line to be broken by APR_EAGAIN,
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* this structure can be used to accumulate the data until a complete line
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* has been read from a bucket.
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*/
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/* This limit applies to the line buffer functions. If an application needs
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* longer lines, then they will need to manually handle line buffering.
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*/
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|
#define SERF_LINEBUF_LIMIT 8000
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typedef struct {
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/* Current state of the buffer. */
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enum {
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SERF_LINEBUF_EMPTY,
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SERF_LINEBUF_READY,
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SERF_LINEBUF_PARTIAL,
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SERF_LINEBUF_CRLF_SPLIT
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} state;
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/* How much of the buffer have we used? */
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apr_size_t used;
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|
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/* The line is read into this buffer, minus CR/LF */
|
|
char line[SERF_LINEBUF_LIMIT];
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|
|
} serf_linebuf_t;
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|
|
/**
|
|
* Initialize the @a linebuf structure.
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|
*/
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|
void serf_linebuf_init(serf_linebuf_t *linebuf);
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|
|
/**
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|
* Fetch a line of text from @a bucket, accumulating the line into
|
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* @a linebuf. @a acceptable specifies the types of newlines which are
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* acceptable for this fetch.
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*
|
|
* ### we should return a data/len pair so that we can avoid a copy,
|
|
* ### rather than having callers look into our state and line buffer.
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|
*/
|
|
apr_status_t serf_linebuf_fetch(
|
|
serf_linebuf_t *linebuf,
|
|
serf_bucket_t *bucket,
|
|
int acceptable);
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|
|
/** @} */
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|
|
|
|
/* Internal functions for bucket use and lifecycle tracking */
|
|
apr_status_t serf_debug__record_read(
|
|
const serf_bucket_t *bucket,
|
|
apr_status_t status);
|
|
void serf_debug__entered_loop(
|
|
serf_bucket_alloc_t *allocator);
|
|
void serf_debug__closed_conn(
|
|
serf_bucket_alloc_t *allocator);
|
|
void serf_debug__bucket_destroy(
|
|
const serf_bucket_t *bucket);
|
|
void serf_debug__bucket_alloc_check(
|
|
serf_bucket_alloc_t *allocator);
|
|
|
|
/* Version info */
|
|
#define SERF_MAJOR_VERSION 1
|
|
#define SERF_MINOR_VERSION 2
|
|
#define SERF_PATCH_VERSION 1
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|
|
|
/* Version number string */
|
|
#define SERF_VERSION_STRING APR_STRINGIFY(SERF_MAJOR_VERSION) "." \
|
|
APR_STRINGIFY(SERF_MINOR_VERSION) "." \
|
|
APR_STRINGIFY(SERF_PATCH_VERSION)
|
|
|
|
/**
|
|
* Check at compile time if the Serf version is at least a certain
|
|
* level.
|
|
* @param major The major version component of the version checked
|
|
* for (e.g., the "1" of "1.3.0").
|
|
* @param minor The minor version component of the version checked
|
|
* for (e.g., the "3" of "1.3.0").
|
|
* @param patch The patch level component of the version checked
|
|
* for (e.g., the "0" of "1.3.0").
|
|
*/
|
|
#define SERF_VERSION_AT_LEAST(major,minor,patch) \
|
|
(((major) < SERF_MAJOR_VERSION) \
|
|
|| ((major) == SERF_MAJOR_VERSION && (minor) < SERF_MINOR_VERSION) \
|
|
|| ((major) == SERF_MAJOR_VERSION && (minor) == SERF_MINOR_VERSION && \
|
|
(patch) <= SERF_PATCH_VERSION))
|
|
|
|
|
|
/**
|
|
* Returns the version of the library the application has linked/loaded.
|
|
* Values are returned in @a major, @a minor, and @a patch.
|
|
*
|
|
* Applications will want to use this function to verify compatibility,
|
|
* expecially while serf has not reached a 1.0 milestone. APIs and
|
|
* semantics may change drastically until the library hits 1.0.
|
|
*/
|
|
void serf_lib_version(
|
|
int *major,
|
|
int *minor,
|
|
int *patch);
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Every user of serf will want to deal with our various bucket types.
|
|
* Go ahead and include that header right now.
|
|
*
|
|
* Note: make sure this occurs outside of the C++ namespace block
|
|
*/
|
|
#include "serf_bucket_types.h"
|
|
|
|
|
|
#endif /* !SERF_H */
|