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HTTP: Skip body and left message by upgrade. v5.0.73

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pull/3201/head
winlin 2 years ago
parent d4ce877407
commit cfbbe3044f
4 changed files with 16 additions and 52 deletions
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1
trunk/doc/CHANGELOG.md
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@ -7,6 +7,7 @@ The changelog for SRS.
## SRS 5.0 Changelog
* v5.0, 2022-10-05, HTTP: Skip body and left message by upgrade. v5.0.73
* v5.0, 2022-10-02, ST: Support set context id while thread running. v5.0.72
* v5.0, 2022-09-30, RTC: Refine SDP to support GB28181 SSRC spec. v5.0.71
* v5.0, 2022-09-30, GB28181: Refine HTTP parser to support SIP. v5.0.70

2
trunk/src/core/srs_core_version5.hpp
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@ -9,6 +9,6 @@
#define VERSION_MAJOR 5
#define VERSION_MINOR 0
#define VERSION_REVISION 72
#define VERSION_REVISION 73
#endif

60
trunk/src/protocol/srs_protocol_http_conn.cpp
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@ -26,7 +26,6 @@ SrsHttpParser::SrsHttpParser()
buffer = new SrsFastStream();
header = NULL;
p_body_start = p_header_tail = NULL;
type_ = HTTP_REQUEST;
parsed_type_ = HTTP_BOTH;
}
@ -74,8 +73,6 @@ srs_error_t SrsHttpParser::parse_message(ISrsReader* reader, ISrsHttpMessage** p
// Reset parser data and state.
state = SrsHttpParseStateInit;
memset(&hp_header, 0, sizeof(http_parser));
// The body that we have read from cache.
p_body_start = p_header_tail = NULL;
// We must reset the field name and value, because we may get a partial value in on_header_value.
field_name = field_value = "";
// Reset the url.
@ -98,6 +95,8 @@ srs_error_t SrsHttpParser::parse_message(ISrsReader* reader, ISrsHttpMessage** p
parsed_type_ = HTTP_BOTH;
// callback object ptr.
parser.data = (void*)this;
// Always skip body, because we only want to parse the header.
parser.flags |= F_SKIPBODY;
// do parse
if ((err = parse_message_imp(reader)) != srs_success) {
@ -131,23 +130,10 @@ srs_error_t SrsHttpParser::parse_message_imp(ISrsReader* reader)
ssize_t consumed = http_parser_execute(&parser, &settings, buffer->bytes(), buffer->size());
// The error is set in http_errno.
enum http_errno code;
if ((code = HTTP_PARSER_ERRNO(&parser)) != HPE_OK) {
return srs_error_new(ERROR_HTTP_PARSE_HEADER, "parse %dB, nparsed=%d, err=%d/%s %s",
buffer->size(), (int)consumed, code, http_errno_name(code), http_errno_description(code));
}
// When buffer consumed these bytes, it's dropped so the new ptr is actually the HTTP body. But http-parser
// doesn't indicate the specific sizeof header, so we must finger it out.
// @remark We shouldn't use on_body, because it only works for normal case, and losts the chunk header and length.
// @see https://github.com/ossrs/srs/issues/1508
if (p_header_tail && buffer->bytes() < p_body_start) {
for (const char* p = p_header_tail; p <= p_body_start - 4; p++) {
if (p[0] == SRS_CONSTS_CR && p[1] == SRS_CONSTS_LF && p[2] == SRS_CONSTS_CR && p[3] == SRS_CONSTS_LF) {
consumed = p + 4 - buffer->bytes();
break;
}
}
enum http_errno code = HTTP_PARSER_ERRNO(&parser);
if (code != HPE_OK) {
return srs_error_new(ERROR_HTTP_PARSE_HEADER, "parse %dB, nparsed=%d, err=%d/%s %s",
buffer->size(), (int)consumed, code, http_errno_name(code), http_errno_description(code));
}
srs_info("size=%d, nparsed=%d", buffer->size(), (int)consumed);
@ -201,14 +187,15 @@ int SrsHttpParser::on_headers_complete(http_parser* parser)
// save the parser when header parse completed.
obj->state = SrsHttpParseStateHeaderComplete;
// We must update the body start when header complete, because sometimes we only got header.
// When we got the body start event, we will update it to much precious position.
obj->p_body_start = obj->buffer->bytes() + obj->buffer->size();
srs_info("***HEADERS COMPLETE***");
// see http_parser.c:1570, return 1 to skip body.
return 0;
// The return code of this callback:
// 0: Continue to process body.
// 1: Skip body, but continue to parse util all data parsed.
// 2: Upgrade and skip body and left message, because it is in a different protocol.
// N: Error and failed as HPE_CB_headers_complete.
// We choose 2 because we only want to parse the header, not the body.
return 2;
}
int SrsHttpParser::on_message_complete(http_parser* parser)
@ -233,11 +220,6 @@ int SrsHttpParser::on_url(http_parser* parser, const char* at, size_t length)
// Note that this function might be called for multiple times, and we got pieces of content.
obj->url.append(at, (int)length);
}
// When header parsed, we must save the position of start for body,
// because we have to consume the header in buffer.
// @see https://github.com/ossrs/srs/issues/1508
obj->p_header_tail = at;
srs_info("Method: %d, Url: %.*s", parser->method, (int)length, at);
@ -257,11 +239,6 @@ int SrsHttpParser::on_header_field(http_parser* parser, const char* at, size_t l
if (length > 0) {
obj->field_name.append(at, (int)length);
}
// When header parsed, we must save the position of start for body,
// because we have to consume the header in buffer.
// @see https://github.com/ossrs/srs/issues/1508
obj->p_header_tail = at;
srs_info("Header field(%d bytes): %.*s", (int)length, (int)length, at);
return 0;
@ -274,11 +251,6 @@ int SrsHttpParser::on_header_value(http_parser* parser, const char* at, size_t l
if (length > 0) {
obj->field_value.append(at, (int)length);
// When header parsed, we must save the position of start for body,
// because we have to consume the header in buffer.
// @see https://github.com/ossrs/srs/issues/1508
obj->p_header_tail = at;
}
srs_info("Header value(%d bytes): %.*s", (int)length, (int)length, at);
@ -293,10 +265,6 @@ int SrsHttpParser::on_body(http_parser* parser, const char* at, size_t length)
// save the parser when body parsed.
obj->state = SrsHttpParseStateBody;
// Used to discover the header length.
// @see https://github.com/ossrs/srs/issues/1508
obj->p_body_start = at;
srs_info("Body: %.*s", (int)length, at);
return 0;

5
trunk/src/protocol/srs_protocol_http_conn.hpp
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@ -41,11 +41,6 @@ private:
SrsHttpHeader* header;
enum http_parser_type type_;
enum http_parser_type parsed_type_;
private:
// Point to the start of body.
const char* p_body_start;
// To discover the length of header, point to the last few bytes in header.
const char* p_header_tail;
public:
SrsHttpParser();
virtual ~SrsHttpParser();

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