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HTTP/2: added debug logging of response headers.

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Because of HPACK compression it's hard to see what headers are actually
sent by the server.
This commit is contained in:
Valentin Bartenev 2016-02-16 17:49:14 +03:00
parent fcfe483292
commit b5d7d3f024
1 changed files with 41 additions and 0 deletions
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41
src/http/v2/ngx_http_v2_filter_module.c
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@ -421,6 +421,10 @@ ngx_http_v2_header_filter(ngx_http_request_t *r)
start = pos; start = pos;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, fc->log, 0,
"http2 output header: \":status: %03ui\"",
r->headers_out.status);
if (status) { if (status) {
*pos++ = status; *pos++ = status;
@ -431,6 +435,10 @@ ngx_http_v2_header_filter(ngx_http_request_t *r)
} }
if (r->headers_out.server == NULL) { if (r->headers_out.server == NULL) {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, fc->log, 0,
"http2 output header: \"server: %s\"",
clcf->server_tokens ? NGINX_VER : "nginx");
*pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_SERVER_INDEX); *pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_SERVER_INDEX);
if (clcf->server_tokens) { if (clcf->server_tokens) {
@ -448,6 +456,10 @@ ngx_http_v2_header_filter(ngx_http_request_t *r)
} }
if (r->headers_out.date == NULL) { if (r->headers_out.date == NULL) {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, fc->log, 0,
"http2 output header: \"date: %V\"",
&ngx_cached_http_time);
*pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_DATE_INDEX); *pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_DATE_INDEX);
pos = ngx_http_v2_write_value(pos, ngx_cached_http_time.data, pos = ngx_http_v2_write_value(pos, ngx_cached_http_time.data,
ngx_cached_http_time.len, tmp); ngx_cached_http_time.len, tmp);
@ -481,6 +493,10 @@ ngx_http_v2_header_filter(ngx_http_request_t *r)
r->headers_out.content_type.data = p - len; r->headers_out.content_type.data = p - len;
} }
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, fc->log, 0,
"http2 output header: \"content-type: %V\"",
&r->headers_out.content_type);
pos = ngx_http_v2_write_value(pos, r->headers_out.content_type.data, pos = ngx_http_v2_write_value(pos, r->headers_out.content_type.data,
r->headers_out.content_type.len, tmp); r->headers_out.content_type.len, tmp);
} }
@ -488,6 +504,10 @@ ngx_http_v2_header_filter(ngx_http_request_t *r)
if (r->headers_out.content_length == NULL if (r->headers_out.content_length == NULL
&& r->headers_out.content_length_n >= 0) && r->headers_out.content_length_n >= 0)
{ {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, fc->log, 0,
"http2 output header: \"content-length: %O\"",
r->headers_out.content_length_n);
*pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_CONTENT_LENGTH_INDEX); *pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_CONTENT_LENGTH_INDEX);
p = pos; p = pos;
@ -503,6 +523,10 @@ ngx_http_v2_header_filter(ngx_http_request_t *r)
ngx_http_time(pos, r->headers_out.last_modified_time); ngx_http_time(pos, r->headers_out.last_modified_time);
len = sizeof("Wed, 31 Dec 1986 18:00:00 GMT") - 1; len = sizeof("Wed, 31 Dec 1986 18:00:00 GMT") - 1;
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, fc->log, 0,
"http2 output header: \"last-modified: %*s\"",
len, pos);
/* /*
* Date will always be encoded using huffman in the temporary buffer, * Date will always be encoded using huffman in the temporary buffer,
* so it's safe here to use src and dst pointing to the same address. * so it's safe here to use src and dst pointing to the same address.
@ -511,6 +535,10 @@ ngx_http_v2_header_filter(ngx_http_request_t *r)
} }
if (r->headers_out.location && r->headers_out.location->value.len) { if (r->headers_out.location && r->headers_out.location->value.len) {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, fc->log, 0,
"http2 output header: \"location: %V\"",
&r->headers_out.location->value);
*pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_LOCATION_INDEX); *pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_LOCATION_INDEX);
pos = ngx_http_v2_write_value(pos, r->headers_out.location->value.data, pos = ngx_http_v2_write_value(pos, r->headers_out.location->value.data,
r->headers_out.location->value.len, tmp); r->headers_out.location->value.len, tmp);
@ -518,6 +546,9 @@ ngx_http_v2_header_filter(ngx_http_request_t *r)
#if (NGX_HTTP_GZIP) #if (NGX_HTTP_GZIP)
if (r->gzip_vary) { if (r->gzip_vary) {
ngx_log_debug0(NGX_LOG_DEBUG_HTTP, fc->log, 0,
"http2 output header: \"vary: Accept-Encoding\"");
*pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_VARY_INDEX); *pos++ = ngx_http_v2_inc_indexed(NGX_HTTP_V2_VARY_INDEX);
pos = ngx_cpymem(pos, accept_encoding, sizeof(accept_encoding)); pos = ngx_cpymem(pos, accept_encoding, sizeof(accept_encoding));
} }
@ -542,6 +573,16 @@ ngx_http_v2_header_filter(ngx_http_request_t *r)
continue; continue;
} }
#if (NGX_DEBUG)
if (fc->log->log_level & NGX_LOG_DEBUG_HTTP) {
ngx_strlow(tmp, header[i].key.data, header[i].key.len);
ngx_log_debug3(NGX_LOG_DEBUG_HTTP, fc->log, 0,
"http2 output header: \"%*s: %V\"",
header[i].key.len, tmp, &header[i].value);
}
#endif
*pos++ = 0; *pos++ = 0;
pos = ngx_http_v2_write_name(pos, header[i].key.data, pos = ngx_http_v2_write_name(pos, header[i].key.data,