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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* soup-message-handlers.c: HTTP response handlers
*
* Copyright (C) 2000-2003, Ximian, Inc.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "soup-message.h"
#include "soup-message-private.h"
typedef enum {
SOUP_HANDLER_HEADER = 1,
SOUP_HANDLER_STATUS_CODE,
SOUP_HANDLER_STATUS_CLASS
} SoupHandlerKind;
typedef struct {
SoupHandlerPhase phase;
SoupMessageCallbackFn handler_cb;
gpointer user_data;
SoupHandlerKind kind;
union {
guint status_code;
SoupStatusClass status_class;
const char *header;
} data;
} SoupHandlerData;
static inline void
run_handler (SoupMessage *msg,
SoupHandlerPhase invoke_phase,
SoupHandlerData *data)
{
if (data->phase != invoke_phase)
return;
switch (data->kind) {
case SOUP_HANDLER_HEADER:
if (!soup_message_get_header (msg->response_headers,
data->data.header))
return;
break;
case SOUP_HANDLER_STATUS_CODE:
if (msg->status_code != data->data.status_code)
return;
break;
case SOUP_HANDLER_STATUS_CLASS:
if (msg->status_code < data->data.status_class * 100 ||
msg->status_code >= (data->data.status_class + 1) * 100)
return;
break;
default:
break;
}
(*data->handler_cb) (msg, data->user_data);
}
/**
* soup_message_run_handlers:
* @msg: a #SoupMessage
* @invoke_phase: which group of handlers to run
*
* Run each @invoke_phase handler on @msg. If a handler requeues the
* message, we stop processing at that point.
*/
void
soup_message_run_handlers (SoupMessage *msg, SoupHandlerPhase invoke_phase)
{
SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (msg);
GSList *copy, *list;
g_return_if_fail (SOUP_IS_MESSAGE (msg));
/* Jump through hoops to deal with callbacks that modify the list. */
copy = g_slist_copy (priv->content_handlers);
for (list = copy; list; list = list->next) {
if (!g_slist_find (priv->content_handlers, list->data))
continue;
run_handler (msg, invoke_phase, list->data);
if (SOUP_MESSAGE_IS_STARTING (msg))
break;
}
g_slist_free (copy);
}
static void
add_handler (SoupMessage *msg,
SoupHandlerPhase phase,
SoupMessageCallbackFn handler_cb,
gpointer user_data,
SoupHandlerKind kind,
const char *header,
guint status_code,
SoupStatusClass status_class)
{
SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (msg);
SoupHandlerData *data;
data = g_new0 (SoupHandlerData, 1);
data->phase = phase;
data->handler_cb = handler_cb;
data->user_data = user_data;
data->kind = kind;
switch (kind) {
case SOUP_HANDLER_HEADER:
data->data.header = header;
break;
case SOUP_HANDLER_STATUS_CODE:
data->data.status_code = status_code;
break;
case SOUP_HANDLER_STATUS_CLASS:
data->data.status_class = status_class;
break;
default:
break;
}
priv->content_handlers =
g_slist_append (priv->content_handlers, data);
}
/**
* soup_message_add_header_handler:
* @msg: a #SoupMessage
* @header: HTTP response header to match against
* @phase: processing phase to run the handler in
* @handler_cb: the handler
* @user_data: data to pass to @handler_cb
*
* Adds a handler to @msg for messages containing the given response
* header.
**/
void
soup_message_add_header_handler (SoupMessage *msg,
const char *header,
SoupHandlerPhase phase,
SoupMessageCallbackFn handler_cb,
gpointer user_data)
{
g_return_if_fail (SOUP_IS_MESSAGE (msg));
g_return_if_fail (header != NULL);
g_return_if_fail (handler_cb != NULL);
add_handler (msg, phase, handler_cb, user_data,
SOUP_HANDLER_HEADER,
header, 0, 0);
}
/**
* soup_message_add_status_code_handler:
* @msg: a #SoupMessage
* @status_code: HTTP status code to match against
* @phase: processing phase to run the handler in
* @handler_cb: the handler
* @user_data: data to pass to @handler_cb
*
* Adds a handler to @msg for messages receiving the given status
* code.
**/
void
soup_message_add_status_code_handler (SoupMessage *msg,
guint status_code,
SoupHandlerPhase phase,
SoupMessageCallbackFn handler_cb,
gpointer user_data)
{
g_return_if_fail (SOUP_IS_MESSAGE (msg));
g_return_if_fail (status_code != 0);
g_return_if_fail (handler_cb != NULL);
add_handler (msg, phase, handler_cb, user_data,
SOUP_HANDLER_STATUS_CODE,
NULL, status_code, 0);
}
/**
* soup_message_add_status_class_handler:
* @msg: a #SoupMessage
* @status_class: HTTP status code class to match against
* @phase: processing phase to run the handler in
* @handler_cb: the handler
* @user_data: data to pass to @handler_cb
*
* Adds a handler to @msg for messages receiving a status code in
* the given class.
**/
void
soup_message_add_status_class_handler (SoupMessage *msg,
SoupStatusClass status_class,
SoupHandlerPhase phase,
SoupMessageCallbackFn handler_cb,
gpointer user_data)
{
g_return_if_fail (SOUP_IS_MESSAGE (msg));
g_return_if_fail (status_class != 0);
g_return_if_fail (handler_cb != NULL);
add_handler (msg, phase, handler_cb, user_data,
SOUP_HANDLER_STATUS_CLASS,
NULL, 0, status_class);
}
/**
* soup_message_add_handler:
* @msg: a #SoupMessage
* @phase: processing phase to run the handler in
* @handler_cb: the handler
* @user_data: data to pass to @handler_cb
*
* Adds a handler to @msg for all messages
**/
void
soup_message_add_handler (SoupMessage *msg,
SoupHandlerPhase phase,
SoupMessageCallbackFn handler_cb,
gpointer user_data)
{
g_return_if_fail (SOUP_IS_MESSAGE (msg));
g_return_if_fail (handler_cb != NULL);
add_handler (msg, phase, handler_cb, user_data, 0, NULL, 0, 0);
}
/**
* soup_message_remove_handler:
* @msg: a #SoupMessage
* @phase: processing phase to run the handler in
* @handler_cb: the handler
* @user_data: data to pass to @handler_cb
*
* Removes all matching handlers from @msg
**/
void
soup_message_remove_handler (SoupMessage *msg,
SoupHandlerPhase phase,
SoupMessageCallbackFn handler_cb,
gpointer user_data)
{
SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (msg);
GSList *iter = priv->content_handlers;
while (iter) {
SoupHandlerData *data = iter->data;
if (data->handler_cb == handler_cb &&
data->user_data == user_data &&
data->phase == phase) {
priv->content_handlers =
g_slist_remove (priv->content_handlers,
data);
g_free (data);
break;
}
iter = iter->next;
}
}
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