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/* 
 * nghttp2 - HTTP/2 C Library 
 * 
 * Copyright (c) 2015 Tatsuhiro Tsujikawa 
 * 
 * Permission is hereby granted, free of charge, to any person obtaining 
 * a copy of this software and associated documentation files (the 
 * "Software"), to deal in the Software without restriction, including 
 * without limitation the rights to use, copy, modify, merge, publish, 
 * distribute, sublicense, and/or sell copies of the Software, and to 
 * permit persons to whom the Software is furnished to do so, subject to 
 * the following conditions: 
 * 
 * The above copyright notice and this permission notice shall be 
 * included in all copies or substantial portions of the Software. 
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
 */ 
#ifndef NGHTTP2_HTTP_H 
#define NGHTTP2_HTTP_H 
 
#ifdef HAVE_CONFIG_H 
#  include <config.h>
#endif /* HAVE_CONFIG_H */ 
 
#include <nghttp2/nghttp2.h> 
#include "nghttp2_session.h" 
#include "nghttp2_stream.h" 
 
/* 
 * This function is called when HTTP header field |nv| in |frame| is 
 * received for |stream|.  This function will validate |nv| against 
 * the current state of stream. 
 * 
 * This function returns 0 if it succeeds, or one of the following 
 * negative error codes: 
 * 
 * NGHTTP2_ERR_HTTP_HEADER 
 *     Invalid HTTP header field was received. 
 * NGHTTP2_ERR_IGN_HTTP_HEADER 
 *     Invalid HTTP header field was received but it can be treated as 
 *     if it was not received because of compatibility reasons. 
 */ 
int nghttp2_http_on_header(nghttp2_session *session, nghttp2_stream *stream, 
                           nghttp2_frame *frame, nghttp2_hd_nv *nv, 
                           int trailer); 
 
/* 
 * This function is called when request header is received.  This 
 * function performs validation and returns 0 if it succeeds, or -1. 
 */ 
int nghttp2_http_on_request_headers(nghttp2_stream *stream, 
                                    nghttp2_frame *frame); 
 
/* 
 * This function is called when response header is received.  This 
 * function performs validation and returns 0 if it succeeds, or -1. 
 */ 
int nghttp2_http_on_response_headers(nghttp2_stream *stream); 
 
/* 
 * This function is called trailer header (for both request and 
 * response) is received.  This function performs validation and 
 * returns 0 if it succeeds, or -1. 
 */ 
int nghttp2_http_on_trailer_headers(nghttp2_stream *stream, 
                                    nghttp2_frame *frame); 
 
/* 
 * This function is called when END_STREAM flag is seen in incoming 
 * frame.  This function performs validation and returns 0 if it 
 * succeeds, or -1. 
 */ 
int nghttp2_http_on_remote_end_stream(nghttp2_stream *stream); 
 
/* 
 * This function is called when chunk of data is received.  This 
 * function performs validation and returns 0 if it succeeds, or -1. 
 */ 
int nghttp2_http_on_data_chunk(nghttp2_stream *stream, size_t n); 
 
/* 
 * This function inspects header field in |frame| and records its 
 * method in stream->http_flags.  If frame->hd.type is neither 
 * NGHTTP2_HEADERS nor NGHTTP2_PUSH_PROMISE, this function does 
 * nothing. 
 */ 
void nghttp2_http_record_request_method(nghttp2_stream *stream, 
                                        nghttp2_frame *frame); 
 
#endif /* NGHTTP2_HTTP_H */