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95 lines
4.1 KiB
ReStructuredText
95 lines
4.1 KiB
ReStructuredText
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nghttp2_submit_request
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======================
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Synopsis
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--------
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*#include <nghttp2/nghttp2.h>*
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.. function:: int32_t nghttp2_submit_request( nghttp2_session *session, const nghttp2_priority_spec *pri_spec, const nghttp2_nv *nva, size_t nvlen, const nghttp2_data_provider *data_prd, void *stream_user_data)
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.. warning::
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Deprecated. Use `nghttp2_submit_request2()` instead.
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Submits HEADERS frame and optionally one or more DATA frames.
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The *pri_spec* is a deprecated priority specification of this
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request. ``NULL`` means the default priority (see
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`nghttp2_priority_spec_default_init()`). To specify the priority,
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use `nghttp2_priority_spec_init()`. If *pri_spec* is not ``NULL``,
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this function will copy its data members.
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The ``pri_spec->weight`` must be in [:macro:`NGHTTP2_MIN_WEIGHT`,
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:macro:`NGHTTP2_MAX_WEIGHT`], inclusive. If ``pri_spec->weight``
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is strictly less than :macro:`NGHTTP2_MIN_WEIGHT`, it becomes
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:macro:`NGHTTP2_MIN_WEIGHT`. If it is strictly greater than
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:macro:`NGHTTP2_MAX_WEIGHT`, it becomes
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:macro:`NGHTTP2_MAX_WEIGHT`.
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If
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:enum:`nghttp2_settings_id.NGHTTP2_SETTINGS_NO_RFC7540_PRIORITIES`
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of value of 1 is received by a remote endpoint, *pri_spec* is
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ignored, and treated as if ``NULL`` is specified.
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The *nva* is an array of name/value pair :type:`nghttp2_nv` with
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*nvlen* elements. The application is responsible to include
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required pseudo-header fields (header field whose name starts with
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":") in *nva* and must place pseudo-headers before regular header
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fields.
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This function creates copies of all name/value pairs in *nva*. It
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also lower-cases all names in *nva*. The order of elements in
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*nva* is preserved. For header fields with
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:enum:`nghttp2_nv_flag.NGHTTP2_NV_FLAG_NO_COPY_NAME` and
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:enum:`nghttp2_nv_flag.NGHTTP2_NV_FLAG_NO_COPY_VALUE` are set,
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header field name and value are not copied respectively. With
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:enum:`nghttp2_nv_flag.NGHTTP2_NV_FLAG_NO_COPY_NAME`, application
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is responsible to pass header field name in lowercase. The
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application should maintain the references to them until
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:type:`nghttp2_on_frame_send_callback` or
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:type:`nghttp2_on_frame_not_send_callback` is called.
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HTTP/2 specification has requirement about header fields in the
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request HEADERS. See the specification for more details.
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If *data_prd* is not ``NULL``, it provides data which will be sent
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in subsequent DATA frames. In this case, a method that allows
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request message bodies
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(https://tools.ietf.org/html/rfc7231#section-4) must be specified
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with ``:method`` key in *nva* (e.g. ``POST``). This function does
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not take ownership of the *data_prd*. The function copies the
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members of the *data_prd*. If *data_prd* is ``NULL``, HEADERS have
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END_STREAM set. The *stream_user_data* is data associated to the
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stream opened by this request and can be an arbitrary pointer,
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which can be retrieved later by
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`nghttp2_session_get_stream_user_data()`.
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This function returns assigned stream ID if it succeeds, or one of
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the following negative error codes:
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:enum:`nghttp2_error.NGHTTP2_ERR_NOMEM`
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Out of memory.
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:enum:`nghttp2_error.NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE`
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No stream ID is available because maximum stream ID was
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reached.
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:enum:`nghttp2_error.NGHTTP2_ERR_INVALID_ARGUMENT`
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Trying to depend on itself (new stream ID equals
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``pri_spec->stream_id``).
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:enum:`nghttp2_error.NGHTTP2_ERR_PROTO`
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The *session* is server session.
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.. warning::
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This function returns assigned stream ID if it succeeds. But
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that stream is not created yet. The application must not submit
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frame to that stream ID before
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:type:`nghttp2_before_frame_send_callback` is called for this
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frame. This means `nghttp2_session_get_stream_user_data()` does
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not work before the callback. But
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`nghttp2_session_set_stream_user_data()` handles this situation
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specially, and it can set data to a stream during this period.
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