130 lines
3.6 KiB
C
130 lines
3.6 KiB
C
//
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//
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// Copyright 2015 gRPC authors.
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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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//
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#ifndef GRPC_SRC_CORE_LIB_HTTP_PARSER_H
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#define GRPC_SRC_CORE_LIB_HTTP_PARSER_H
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#include <stddef.h>
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#include <stdint.h>
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#include <grpc/slice.h>
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#include <grpc/support/port_platform.h>
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#include "src/core/lib/debug/trace.h"
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#include "src/core/lib/iomgr/error.h"
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// Maximum length of a header string of the form 'Key: Value\r\n'
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#define GRPC_HTTP_PARSER_MAX_HEADER_LENGTH 4096
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// A single header to be passed in a request
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typedef struct grpc_http_header {
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char* key;
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char* value;
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} grpc_http_header;
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typedef enum {
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GRPC_HTTP_FIRST_LINE,
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GRPC_HTTP_HEADERS,
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GRPC_HTTP_BODY,
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GRPC_HTTP_TRAILERS,
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GRPC_HTTP_END,
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} grpc_http_parser_state;
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typedef enum {
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GRPC_HTTP_CHUNKED_PLAIN,
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GRPC_HTTP_CHUNKED_LENGTH,
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GRPC_HTTP_CHUNKED_IGNORE_ALL_UNTIL_LF,
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GRPC_HTTP_CHUNKED_BODY,
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GRPC_HTTP_CHUNKED_CONSUME_LF,
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} grpc_http_parser_chunked_state;
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typedef enum {
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GRPC_HTTP_HTTP10,
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GRPC_HTTP_HTTP11,
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GRPC_HTTP_HTTP20,
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} grpc_http_version;
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typedef enum {
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GRPC_HTTP_RESPONSE,
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GRPC_HTTP_REQUEST,
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} grpc_http_type;
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// A request
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typedef struct grpc_http_request {
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// Method of the request (e.g. GET, POST)
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char* method;
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// The path of the resource to fetch (only used for parsed requests)
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char* path;
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// HTTP version to use
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grpc_http_version version;
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// Headers attached to the request
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size_t hdr_count;
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grpc_http_header* hdrs;
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// Body: length and contents; contents are NOT null-terminated
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size_t body_length;
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char* body;
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} grpc_http_request;
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// A response
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typedef struct grpc_http_response {
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// HTTP status code
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int status = 0;
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// Headers: count and key/values
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size_t hdr_count = 0;
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grpc_http_header* hdrs = nullptr;
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// Body: length and contents; contents are NOT null-terminated
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size_t body_length = 0;
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// State of the chunked parser. Only valid for the response.
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grpc_http_parser_chunked_state chunked_state = GRPC_HTTP_CHUNKED_PLAIN;
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size_t chunk_length = 0;
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char* body = nullptr;
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} grpc_http_response;
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struct grpc_http_parser {
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grpc_http_parser_state state;
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grpc_http_type type;
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union {
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grpc_http_response* response;
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grpc_http_request* request;
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void* request_or_response;
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} http;
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size_t body_capacity;
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size_t hdr_capacity;
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uint8_t cur_line[GRPC_HTTP_PARSER_MAX_HEADER_LENGTH];
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size_t cur_line_length;
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size_t cur_line_end_length;
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};
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void grpc_http_parser_init(grpc_http_parser* parser, grpc_http_type type,
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void* request_or_response);
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void grpc_http_parser_destroy(grpc_http_parser* parser);
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// Sets \a start_of_body to the offset in \a slice of the start of the body.
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grpc_error_handle grpc_http_parser_parse(grpc_http_parser* parser,
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const grpc_slice& slice,
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size_t* start_of_body);
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grpc_error_handle grpc_http_parser_eof(grpc_http_parser* parser);
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void grpc_http_request_destroy(grpc_http_request* request);
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void grpc_http_response_destroy(grpc_http_response* response);
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extern grpc_core::TraceFlag grpc_http1_trace;
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#endif // GRPC_SRC_CORE_LIB_HTTP_PARSER_H
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