Mercurial > hg > nginx-quic
view src/http/ngx_http_header_filter.c @ 444:42d11f017717
nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Wed, 29 Sep 2004 16:00:49 +0000 |
parents | da8c5707af39 |
children | 23fb87bddda1 |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> #include <nginx.h> static ngx_int_t ngx_http_header_filter_init(ngx_cycle_t *cycle); static ngx_int_t ngx_http_header_filter(ngx_http_request_t *r); static ngx_http_module_t ngx_http_header_filter_module_ctx = { NULL, /* pre conf */ NULL, /* create main configuration */ NULL, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ NULL, /* create location configuration */ NULL, /* merge location configuration */ }; ngx_module_t ngx_http_header_filter_module = { NGX_MODULE, &ngx_http_header_filter_module_ctx, /* module context */ NULL, /* module directives */ NGX_HTTP_MODULE, /* module type */ ngx_http_header_filter_init, /* init module */ NULL /* init child */ }; static char server_string[] = "Server: " NGINX_VER CRLF; static ngx_str_t http_codes[] = { ngx_string("200 OK"), ngx_null_string, /* "201 Created" */ ngx_null_string, /* "202 Accepted" */ ngx_null_string, /* "203 Non-Authoritative Information" */ ngx_null_string, /* "204 No Content" */ ngx_null_string, /* "205 Reset Content" */ ngx_string("206 Partial Content"), ngx_null_string, /* "207 Multi-Status" */ #if 0 ngx_null_string, /* "300 Multiple Choices" */ #endif ngx_string("301 Moved Permanently"), #if 0 ngx_string("302 Moved Temporarily"), #else ngx_string("302 Found"), #endif ngx_null_string, /* "303 See Other" */ ngx_string("304 Not Modified"), ngx_string("400 Bad Request"), ngx_string("401 Unauthorized"), ngx_null_string, /* "402 Payment Required" */ ngx_string("403 Forbidden"), ngx_string("404 Not Found"), ngx_string("405 Not Allowed"), ngx_null_string, /* "406 Not Acceptable" */ ngx_null_string, /* "407 Proxy Authentication Required" */ ngx_string("408 Request Time-out"), ngx_null_string, /* "409 Conflict" */ ngx_null_string, /* "410 Gone" */ ngx_string("411 Length Required"), ngx_null_string, /* "412 Precondition Failed" */ ngx_string("413 Request Entity Too Large"), ngx_null_string, /* "414 Request-URI Too Large" but we never send it * because we treat such requests as the HTTP/0.9 * requests and send only a body without a header */ ngx_null_string, /* "415 Unsupported Media Type" */ ngx_string("416 Requested Range Not Satisfiable"), ngx_string("500 Internal Server Error"), ngx_string("501 Method Not Implemented"), ngx_string("502 Bad Gateway"), ngx_string("503 Service Temporarily Unavailable"), ngx_string("504 Gateway Time-out") }; ngx_http_header_t ngx_http_headers_out[] = { { ngx_string("Server"), offsetof(ngx_http_headers_out_t, server) }, { ngx_string("Date"), offsetof(ngx_http_headers_out_t, date) }, { ngx_string("Content-Type"), offsetof(ngx_http_headers_out_t, content_type) }, { ngx_string("Content-Length"), offsetof(ngx_http_headers_out_t, content_length) }, { ngx_string("Content-Encoding"), offsetof(ngx_http_headers_out_t, content_encoding) }, { ngx_string("Location"), offsetof(ngx_http_headers_out_t, location) }, { ngx_string("Last-Modified"), offsetof(ngx_http_headers_out_t, last_modified) }, { ngx_string("Accept-Ranges"), offsetof(ngx_http_headers_out_t, accept_ranges) }, { ngx_string("Expires"), offsetof(ngx_http_headers_out_t, expires) }, { ngx_string("Cache-Control"), offsetof(ngx_http_headers_out_t, cache_control) }, { ngx_string("ETag"), offsetof(ngx_http_headers_out_t, etag) }, { ngx_null_string, 0 } }; static ngx_int_t ngx_http_header_filter(ngx_http_request_t *r) { u_char *p; size_t len; ngx_uint_t status, i; ngx_buf_t *b; ngx_chain_t *ln; ngx_list_part_t *part; ngx_table_elt_t *header; ngx_http_core_loc_conf_t *clcf; if (r->http_version < NGX_HTTP_VERSION_10) { return NGX_OK; } if (r->method == NGX_HTTP_HEAD) { r->header_only = 1; } if (r->headers_out.last_modified_time != -1) { if (r->headers_out.status != NGX_HTTP_OK && r->headers_out.status != NGX_HTTP_NOT_MODIFIED && r->headers_out.status != NGX_HTTP_PARTIAL_CONTENT) { r->headers_out.last_modified_time = -1; r->headers_out.last_modified = NULL; } } /* 2 is for trailing "\r\n" and 2 is for "\r\n" in the end of header */ len = sizeof("HTTP/1.x ") - 1 + 2 + 2; /* status line */ if (r->headers_out.status_line.len) { len += r->headers_out.status_line.len; #if (NGX_SUPPRESS_WARN) status = NGX_INVALID_ARRAY_INDEX; #endif } else { if (r->headers_out.status < NGX_HTTP_MOVED_PERMANENTLY) { /* 2XX */ status = r->headers_out.status - NGX_HTTP_OK; } else if (r->headers_out.status < NGX_HTTP_BAD_REQUEST) { /* 3XX */ status = r->headers_out.status - NGX_HTTP_MOVED_PERMANENTLY + 8; if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED) { r->header_only = 1; } } else if (r->headers_out.status < NGX_HTTP_INTERNAL_SERVER_ERROR) { /* 4XX */ status = r->headers_out.status - NGX_HTTP_BAD_REQUEST + 8 + 4; } else { /* 5XX */ status = r->headers_out.status - NGX_HTTP_INTERNAL_SERVER_ERROR + 8 + 4 + 17; } len += http_codes[status].len; } if (r->headers_out.server && r->headers_out.server->key.len) { len += r->headers_out.server->key.len + r->headers_out.server->value.len + 2; } else { len += sizeof(server_string) - 1; } if (r->headers_out.date && r->headers_out.date->key.len) { len += r->headers_out.date->key.len + r->headers_out.date->value.len + 2; } else { len += sizeof("Date: Mon, 28 Sep 1970 06:00:00 GMT" CRLF) - 1; } if (r->headers_out.content_length == NULL) { if (r->headers_out.content_length_n >= 0) { len += sizeof("Content-Length: ") - 1 + NGX_OFF_T_LEN + 2; } } if (r->headers_out.content_type && r->headers_out.content_type->value.len) { r->headers_out.content_type->key.len = 0; len += sizeof("Content-Type: ") - 1 + r->headers_out.content_type->value.len + 2; if (r->headers_out.charset.len) { len += sizeof("; charset=") - 1 + r->headers_out.charset.len; } } if (r->headers_out.location && r->headers_out.location->value.len && r->headers_out.location->value.data[0] == '/') { r->headers_out.location->key.len = 0; len += sizeof("Location: http://") - 1 + r->server_name->len + r->headers_out.location->value.len + 2; if (r->port != 80) { len += r->port_text->len; } } if (r->headers_out.last_modified && r->headers_out.last_modified->key.len) { len += r->headers_out.last_modified->key.len + r->headers_out.last_modified->value.len + 2; } else if (r->headers_out.last_modified_time != -1) { len += sizeof("Last-Modified: Mon, 28 Sep 1970 06:00:00 GMT" CRLF) - 1; } if (r->chunked) { len += sizeof("Transfer-Encoding: chunked" CRLF) - 1; } clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); if (r->keepalive) { len += sizeof("Connection: keep-alive" CRLF) - 1; /* * MSIE and Opera ignore the "Keep-Alive: timeout=<N>" header. * MSIE keeps the connection alive for about 60-65 seconds. * Opera keeps the connection alive very long. * Mozilla keeps the connection alive for N plus about 1-10 seconds. * Konqueror keeps the connection alive for about N seconds. */ if (clcf->keepalive_header && (r->headers_in.gecko || r->headers_in.konqueror)) { len += sizeof("Keep-Alive: timeout=") - 1 + TIME_T_LEN + 2; } } else { len += sizeof("Connection: closed" CRLF) - 1; } part = &r->headers_out.headers.part; header = part->elts; for (i = 0; /* void */; i++) { if (i >= part->nelts) { if (part->next == NULL) { break; } part = part->next; header = part->elts; i = 0; } if (header[i].key.len == 0) { continue; } /* 2 is for ": " and 2 is for "\r\n" */ len += header[i].key.len + 2 + header[i].value.len + 2; } if (!(b = ngx_create_temp_buf(r->pool, len))) { return NGX_ERROR; } /* "HTTP/1.x " */ b->last = ngx_cpymem(b->last, "HTTP/1.1 ", sizeof("HTTP/1.x ") - 1); /* status line */ if (r->headers_out.status_line.len) { b->last = ngx_cpymem(b->last, r->headers_out.status_line.data, r->headers_out.status_line.len); } else { b->last = ngx_cpymem(b->last, http_codes[status].data, http_codes[status].len); } *(b->last++) = CR; *(b->last++) = LF; if (!(r->headers_out.server && r->headers_out.server->key.len)) { b->last = ngx_cpymem(b->last, server_string, sizeof(server_string) - 1); } if (!(r->headers_out.date && r->headers_out.date->key.len)) { b->last = ngx_cpymem(b->last, "Date: ", sizeof("Date: ") - 1); b->last = ngx_cpymem(b->last, ngx_cached_http_time.data, ngx_cached_http_time.len); *(b->last++) = CR; *(b->last++) = LF; } if (r->headers_out.content_length == NULL) { if (r->headers_out.content_length_n >= 0) { b->last += ngx_snprintf((char *) b->last, sizeof("Content-Length: ") + NGX_OFF_T_LEN + 2, "Content-Length: " OFF_T_FMT CRLF, r->headers_out.content_length_n); } } if (r->headers_out.content_type && r->headers_out.content_type->value.len) { b->last = ngx_cpymem(b->last, "Content-Type: ", sizeof("Content-Type: ") - 1); p = b->last; b->last = ngx_cpymem(b->last, r->headers_out.content_type->value.data, r->headers_out.content_type->value.len); if (r->headers_out.charset.len) { b->last = ngx_cpymem(b->last, "; charset=", sizeof("; charset=") - 1); b->last = ngx_cpymem(b->last, r->headers_out.charset.data, r->headers_out.charset.len); r->headers_out.content_type->value.len = b->last - p; r->headers_out.content_type->value.data = p; } *(b->last++) = CR; *(b->last++) = LF; } if (r->headers_out.location && r->headers_out.location->value.len && r->headers_out.location->value.data[0] == '/') { p = b->last + sizeof("Location: ") - 1; b->last = ngx_cpymem(b->last, "Location: http://", sizeof("Location: http://") - 1); b->last = ngx_cpymem(b->last, r->server_name->data, r->server_name->len); if (r->port != 80) { b->last = ngx_cpymem(b->last, r->port_text->data, r->port_text->len); } b->last = ngx_cpymem(b->last, r->headers_out.location->value.data, r->headers_out.location->value.len); r->headers_out.location->value.len = b->last - p; r->headers_out.location->value.data = p; *(b->last++) = CR; *(b->last++) = LF; } if (!(r->headers_out.last_modified && r->headers_out.last_modified->key.len) && r->headers_out.last_modified_time != -1) { b->last = ngx_cpymem(b->last, "Last-Modified: ", sizeof("Last-Modified: ") - 1); b->last += ngx_http_time(b->last, r->headers_out.last_modified_time); *(b->last++) = CR; *(b->last++) = LF; } if (r->chunked) { b->last = ngx_cpymem(b->last, "Transfer-Encoding: chunked" CRLF, sizeof("Transfer-Encoding: chunked" CRLF) - 1); } if (r->keepalive) { b->last = ngx_cpymem(b->last, "Connection: keep-alive" CRLF, sizeof("Connection: keep-alive" CRLF) - 1); if (clcf->keepalive_header && (r->headers_in.gecko || r->headers_in.konqueror)) { b->last += ngx_snprintf((char *) b->last, sizeof("Keep-Alive: timeout=") + TIME_T_LEN + 2, "Keep-Alive: timeout=" TIME_T_FMT CRLF, clcf->keepalive_header); } } else { b->last = ngx_cpymem(b->last, "Connection: close" CRLF, sizeof("Connection: close" CRLF) - 1); } part = &r->headers_out.headers.part; header = part->elts; for (i = 0; /* void */; i++) { if (i >= part->nelts) { if (part->next == NULL) { break; } part = part->next; header = part->elts; i = 0; } if (header[i].key.len == 0) { continue; } b->last = ngx_cpymem(b->last, header[i].key.data, header[i].key.len); *(b->last++) = ':' ; *(b->last++) = ' ' ; b->last = ngx_cpymem(b->last, header[i].value.data, header[i].value.len); *(b->last++) = CR; *(b->last++) = LF; } #if (NGX_DEBUG) *(b->last) = '\0'; ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "%s\n", b->pos); #endif /* the end of HTTP header */ *(b->last++) = CR; *(b->last++) = LF; r->header_size = b->last - b->pos; if (r->header_only) { b->last_buf = 1; } if (!(ln = ngx_alloc_chain_link(r->pool))) { return NGX_ERROR; } ln->buf = b; ln->next = NULL; return ngx_http_write_filter(r, ln); } static ngx_int_t ngx_http_header_filter_init(ngx_cycle_t *cycle) { ngx_http_top_header_filter = ngx_http_header_filter; return NGX_OK; }