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libsoup Reference Manual | ![]() |
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SoupMessage; SoupMessage* soup_message_new (const char *method, const char *uri_string); SoupMessage* soup_message_new_from_uri (const char *method, SoupURI *uri); void soup_message_set_request (SoupMessage *msg, const char *content_type, SoupMemoryUse req_use, const char *req_body, gsize req_length); void soup_message_set_response (SoupMessage *msg, const char *content_type, SoupMemoryUse resp_use, const char *resp_body, gsize resp_length); enum SoupHTTPVersion; void soup_message_set_http_version (SoupMessage *msg, SoupHTTPVersion version); SoupHTTPVersion soup_message_get_http_version (SoupMessage *msg); SoupURI* soup_message_get_uri (SoupMessage *msg); void soup_message_set_uri (SoupMessage *msg, SoupURI *uri); SoupAddress* soup_message_get_address (SoupMessage *msg); void soup_message_set_status (SoupMessage *msg, guint status_code); void soup_message_set_status_full (SoupMessage *msg, guint status_code, const char *reason_phrase); gboolean soup_message_is_keepalive (SoupMessage *msg); guint soup_message_add_header_handler (SoupMessage *msg, const char *signal, const char *header, GCallback callback, gpointer user_data); guint soup_message_add_status_code_handler (SoupMessage *msg, const char *signal, guint status_code, GCallback callback, gpointer user_data); enum SoupMessageFlags; void soup_message_set_flags (SoupMessage *msg, SoupMessageFlags flags); SoupMessageFlags soup_message_get_flags (SoupMessage *msg); SoupBuffer* (*SoupChunkAllocator) (SoupMessage *msg, gsize max_len, gpointer user_data); void soup_message_set_chunk_allocator (SoupMessage *msg, SoupChunkAllocator allocator, gpointer user_data, GDestroyNotify destroy_notify); #define SOUP_MESSAGE_METHOD #define SOUP_MESSAGE_URI #define SOUP_MESSAGE_HTTP_VERSION #define SOUP_MESSAGE_FLAGS #define SOUP_MESSAGE_STATUS_CODE #define SOUP_MESSAGE_REASON_PHRASE #define SOUP_MESSAGE_SERVER_SIDE
A SoupMessage represents an HTTP message that is being sent or received.
For client-side usage, you would create a SoupMessage with
soup_message_new()
or soup_message_new_from_uri()
, set up its
fields appropriate, and send it via a SoupSession.
For server-side usage, SoupServer will create SoupMessages automatically for incoming requests, which your application will receive via handlers.
Note that libsoup's terminology here does not quite match the HTTP specification: in RFC 2616, an "HTTP-message" is either a Request, or a Response. In libsoup, a SoupMessage combines both the request and the response.
typedef struct { GObject parent; const char *method; guint status_code; char *reason_phrase; SoupMessageBody *request_body; SoupMessageHeaders *request_headers; SoupMessageBody *response_body; SoupMessageHeaders *response_headers; } SoupMessage;
Represents an HTTP message being sent or received.
status_code
will normally be a SoupKnownStatusCode, eg,
SOUP_STATUS_OK
, though of course it might actually be an unknown
status code. reason_phrase
is the actual text returned from the
server, which may or may not correspond to the "standard"
description of status_code
. At any rate, it is almost certainly
not localized, and not very descriptive even if it is in the user's
language; you should not use reason_phrase
in user-visible
messages. Rather, you should look at status_code
, and determine an
end-user-appropriate message based on that and on what you were
trying to do.
As described in the SoupMessageBody documentation, the
request_body
and response_body
data
fields will not necessarily
be filled in at all times. When they are filled in, they will be
terminated with a '\0' byte (which is not included in the length
),
so you can use them as ordinary C strings (assuming that you know
that the body doesn't have any other '\0' bytes).
For a client-side SoupMessage, request_body
's data
is usually
filled in right before libsoup writes the request to the network,
but you should not count on this; use soup_message_body_flatten()
if you want to ensure that data
is filled in. response_body
's
data
will be filled in before "finished" is emitted.
For a server-side SoupMessage, request_body
's data
will be
filled in before "got_body" is emitted.
To prevent the data
field from being filled in at all (eg, if you
are handling the data from a "got_chunk", and so don't
need to see it all at the end), call
soup_message_body_set_accumulate()
on response_body
or
request_body
as appropriate, passing FALSE
.
GObject parent ; |
|
const char *method ; |
the HTTP method |
guint status_code ; |
the HTTP status code |
char *reason_phrase ; |
the status phrase associated with status_code
|
SoupMessageBody *request_body ; |
the request body |
SoupMessageHeaders *request_headers ; |
the request headers |
SoupMessageBody *response_body ; |
the response body |
SoupMessageHeaders *response_headers ; |
the response headers |
SoupMessage* soup_message_new (const char *method, const char *uri_string);
Creates a new empty SoupMessage, which will connect to uri
method : |
the HTTP method for the created request |
uri_string : |
the destination endpoint (as a string) |
Returns : | the new SoupMessage (or NULL if uri could not
be parsed).
|
SoupMessage* soup_message_new_from_uri (const char *method, SoupURI *uri);
Creates a new empty SoupMessage, which will connect to uri
method : |
the HTTP method for the created request |
uri : |
the destination endpoint (as a SoupURI) |
Returns : | the new SoupMessage |
void soup_message_set_request (SoupMessage *msg, const char *content_type, SoupMemoryUse req_use, const char *req_body, gsize req_length);
Convenience function to set the request body of a SoupMessage. If
content_type
is NULL
, the request body must be empty as well.
msg : |
the message |
content_type : |
MIME Content-Type of the body |
req_use : |
a SoupMemoryUse describing how to handle req_body
|
req_body : |
a data buffer containing the body of the message request. |
req_length : |
the byte length of req_body .
|
void soup_message_set_response (SoupMessage *msg, const char *content_type, SoupMemoryUse resp_use, const char *resp_body, gsize resp_length);
Convenience function to set the response body of a SoupMessage. If
content_type
is NULL
, the response body must be empty as well.
msg : |
the message |
content_type : |
MIME Content-Type of the body |
resp_use : |
a SoupMemoryUse describing how to handle resp_body
|
resp_body : |
a data buffer containing the body of the message response. |
resp_length : |
the byte length of resp_body .
|
typedef enum { SOUP_HTTP_1_0 = 0, SOUP_HTTP_1_1 = 1 } SoupHTTPVersion;
Indicates the HTTP protocol version being used.
void soup_message_set_http_version (SoupMessage *msg, SoupHTTPVersion version);
Sets the HTTP version on msg
. The default version is
SOUP_HTTP_1_1
. Setting it to SOUP_HTTP_1_0
will prevent certain
functionality from being used.
msg : |
a SoupMessage |
version : |
the HTTP version |
SoupHTTPVersion soup_message_get_http_version (SoupMessage *msg);
Gets the HTTP version of msg
. This is the minimum of the
version from the request and the version from the response.
msg : |
a SoupMessage |
Returns : | the HTTP version |
SoupURI* soup_message_get_uri (SoupMessage *msg);
Gets msg
's URI
msg : |
a SoupMessage |
Returns : | the URI msg is targeted for.
|
void soup_message_set_uri (SoupMessage *msg, SoupURI *uri);
Sets msg
's URI to uri
. If msg
has already been sent and you want
to re-send it with the new URI, you need to call
soup_session_requeue_message()
.
msg : |
a SoupMessage |
uri : |
the new SoupURI |
SoupAddress* soup_message_get_address (SoupMessage *msg);
Gets the address msg
's URI points to. After first setting the
URI on a message, this will be unresolved, although the message's
session will resolve it before sending the message.
msg : |
a SoupMessage |
Returns : | the address msg 's URI points to
|
Since 2.26
void soup_message_set_status (SoupMessage *msg, guint status_code);
Sets msg
's status code to status_code
. If status_code
is a
known value, it will also set msg
's reason_phrase.
msg : |
a SoupMessage |
status_code : |
an HTTP status code |
void soup_message_set_status_full (SoupMessage *msg, guint status_code, const char *reason_phrase);
Sets msg
's status code and reason phrase.
msg : |
a SoupMessage |
status_code : |
an HTTP status code |
reason_phrase : |
a description of the status |
gboolean soup_message_is_keepalive (SoupMessage *msg);
Determines whether or not msg
's connection can be kept alive for
further requests after processing msg
, based on the HTTP version,
Connection header, etc.
msg : |
a SoupMessage |
Returns : | TRUE or FALSE .
|
guint soup_message_add_header_handler (SoupMessage *msg, const char *signal, const char *header, GCallback callback, gpointer user_data);
Adds a signal handler to msg
for signal
, as with
g_signal_connect()
, but with two differences: the callback
will
only be run if msg
has a header named header
, and it will only be
run if no earlier handler cancelled or requeued the message.
If signal
is one of the "got" signals (eg, "got_headers"), or
"finished" or "restarted", then header
is matched against the
incoming message headers (that is, the request_headers for a
client SoupMessage, or the response_headers for a server
SoupMessage). If signal
is one of the "wrote" signals, then
header
is matched against the outgoing message headers.
msg : |
a SoupMessage |
signal : |
signal to connect the handler to. |
header : |
HTTP response header to match against |
callback : |
the header handler |
user_data : |
data to pass to handler_cb
|
Returns : | the handler ID from g_signal_connect()
|
guint soup_message_add_status_code_handler (SoupMessage *msg, const char *signal, guint status_code, GCallback callback, gpointer user_data);
Adds a signal handler to msg
for signal
, as with
g_signal_connect()
but with two differences: the callback
will
only be run if msg
has the status status_code
, and it will only
be run if no earlier handler cancelled or requeued the message.
signal
must be a signal that will be emitted after msg
's status
is set. For a client SoupMessage, this means it can't be a "wrote"
signal. For a server SoupMessage, this means it can't be a "got"
signal.
msg : |
a SoupMessage |
signal : |
signal to connect the handler to. |
status_code : |
status code to match against |
callback : |
the header handler |
user_data : |
data to pass to handler_cb
|
Returns : | the handler ID from g_signal_connect()
|
typedef enum { #ifndef LIBSOUP_DISABLE_DEPRECATED SOUP_MESSAGE_OVERWRITE_CHUNKS = (1 << 3), #endif SOUP_MESSAGE_NO_REDIRECT = (1 << 1) } SoupMessageFlags;
Various flags that can be set on a SoupMessage to alter its behavior.
SOUP_MESSAGE_OVERWRITE_CHUNKS
|
Deprecated: equivalent to calling
soup_message_body_set_accumulate() on the incoming message body
(ie, response_body for a client-side request), passing FALSE .
|
SOUP_MESSAGE_NO_REDIRECT
|
The session should not follow redirect (3xx) responses received by this message. |
void soup_message_set_flags (SoupMessage *msg, SoupMessageFlags flags);
Sets the specified flags on msg
.
msg : |
a SoupMessage |
flags : |
a set of SoupMessageFlags values |
SoupMessageFlags soup_message_get_flags (SoupMessage *msg);
Gets the flags on msg
msg : |
a SoupMessage |
Returns : | the flags |
SoupBuffer* (*SoupChunkAllocator) (SoupMessage *msg, gsize max_len, gpointer user_data);
The prototype for a chunk allocation callback. This should allocate a new SoupBuffer and return it for the I/O layer to read message body data off the network into.
If max_len
is non-0, it indicates the maximum number of bytes that
could be read, based on what is known about the message size. Note
that this might be a very large number, and you should not simply
try to allocate that many bytes blindly. If max_len
is 0, that
means that libsoup does not know how many bytes remain to be read,
and the allocator should return a buffer of a size that it finds
convenient.
If the allocator returns NULL
, the message will be paused. It is
up to the application to make sure that it gets unpaused when it
becomes possible to allocate a new buffer.
msg : |
the SoupMessage the chunk is being allocated for |
max_len : |
the maximum length that will be read, or 0. |
user_data : |
the data passed to soup_message_set_chunk_allocator()
|
Returns : | the new buffer (or NULL )
|
void soup_message_set_chunk_allocator (SoupMessage *msg, SoupChunkAllocator allocator, gpointer user_data, GDestroyNotify destroy_notify);
Sets an alternate chunk-allocation function to use when reading
msg
's body. Every time data is available to read, libsoup will
call allocator
, which should return a SoupBuffer. (See
SoupChunkAllocator for additional details.) Libsoup will then read
data from the network into that buffer, and update the buffer's
length
to indicate how much data it read.
Generally, a custom chunk allocator would be used in conjunction
with soup_message_body_set_accumulate()
FALSE
and
"got_chunk", as part of a strategy to avoid unnecessary
copying of data. However, you cannot assume that every call to the
allocator will be followed by a call to your got_chunk
handler; if
an I/O error occurs, then the buffer will be unreffed without ever
having been used. If your buffer-allocation strategy requires
special cleanup, use soup_buffer_new_with_owner()
rather than doing
the cleanup from the got_chunk
handler.
The other thing to remember when using non-accumulating message
bodies is that the buffer passed to the got_chunk
handler will be
unreffed after the handler returns, just as it would be in the
non-custom-allocated case. If you want to hand the chunk data off
to some other part of your program to use later, you'll need to ref
the SoupBuffer (or its owner, in the soup_buffer_new_with_owner()
case) to ensure that the data remains valid.
msg : |
a SoupMessage |
allocator : |
the chunk allocator callback |
user_data : |
data to pass to allocator
|
destroy_notify : |
destroy notifier to free user_data when msg is
destroyed
|
#define SOUP_MESSAGE_METHOD "method"
Alias for the "method" property. (The message's HTTP method.)
#define SOUP_MESSAGE_URI "uri"
Alias for the "uri" property. (The message's SoupURI.)
#define SOUP_MESSAGE_HTTP_VERSION "http-version"
Alias for the "http-version" property. (The message's SoupHTTPVersion.)
#define SOUP_MESSAGE_FLAGS "flags"
Alias for the "flags" property. (The message's SoupMessageFlags.)
#define SOUP_MESSAGE_STATUS_CODE "status-code"
Alias for the "status-code" property. (The message's HTTP response status code.)
#define SOUP_MESSAGE_REASON_PHRASE "reason-phrase"
Alias for the "reason-phrase" property. (The message's HTTP response reason phrase.)
#define SOUP_MESSAGE_SERVER_SIDE "server-side"
Alias for the "server-side" property. (TRUE
if
the message was created by SoupServer.)