Mercurial > hg > nginx-ranges
diff src/http/ngx_http_header_filter.c @ 0:f0b350454894 NGINX_0_1_0
nginx 0.1.0
*) The first public version.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Mon, 04 Oct 2004 00:00:00 +0400 |
parents | |
children | cc9f381affaa |
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new file mode 100644 --- /dev/null +++ b/src/http/ngx_http_header_filter.c @@ -0,0 +1,459 @@ + +/* + * 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; +}