196 lines
4.9 KiB
C
196 lines
4.9 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_http.h>
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static ngx_int_t ngx_http_chunked_filter_init(ngx_cycle_t *cycle);
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static ngx_http_module_t ngx_http_chunked_filter_module_ctx = {
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NULL, /* preconfiguration */
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NULL, /* postconfiguration */
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NULL, /* create main configuration */
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NULL, /* init main configuration */
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NULL, /* create server configuration */
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NULL, /* merge server configuration */
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NULL, /* create location configuration */
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NULL /* merge location configuration */
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};
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ngx_module_t ngx_http_chunked_filter_module = {
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NGX_MODULE_V1,
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&ngx_http_chunked_filter_module_ctx, /* module context */
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NULL, /* module directives */
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NGX_HTTP_MODULE, /* module type */
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NULL, /* init master */
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ngx_http_chunked_filter_init, /* init module */
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NULL, /* init process */
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NULL, /* init thread */
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NULL, /* exit thread */
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NULL, /* exit process */
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NULL, /* exit master */
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NGX_MODULE_V1_PADDING
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};
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static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
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static ngx_int_t
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ngx_http_chunked_header_filter(ngx_http_request_t *r)
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{
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if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED
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|| r->headers_out.status == NGX_HTTP_NO_CONTENT
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|| r->headers_out.status == NGX_HTTP_CREATED
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|| r != r->main)
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{
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return ngx_http_next_header_filter(r);
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}
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if (r->headers_out.content_length_n == -1) {
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if (r->http_version < NGX_HTTP_VERSION_11) {
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r->keepalive = 0;
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} else {
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r->chunked = 1;
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}
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}
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return ngx_http_next_header_filter(r);
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}
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static ngx_int_t
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ngx_http_chunked_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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{
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u_char *chunk;
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off_t size;
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ngx_buf_t *b;
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ngx_chain_t out, tail, *cl, *tl, **ll;
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if (in == NULL || !r->chunked || r->header_only) {
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return ngx_http_next_body_filter(r, in);
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}
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out.buf = NULL;
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ll = &out.next;
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size = 0;
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cl = in;
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for ( ;; ) {
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ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"http chunk: %d", ngx_buf_size(cl->buf));
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size += ngx_buf_size(cl->buf);
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if (cl->buf->flush
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|| cl->buf->sync
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|| ngx_buf_in_memory(cl->buf)
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|| cl->buf->in_file)
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{
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tl = ngx_alloc_chain_link(r->pool);
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if (tl == NULL) {
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return NGX_ERROR;
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}
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tl->buf = cl->buf;
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*ll = tl;
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ll = &tl->next;
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}
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if (cl->next == NULL) {
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break;
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}
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cl = cl->next;
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}
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if (size) {
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b = ngx_calloc_buf(r->pool);
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if (b == NULL) {
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return NGX_ERROR;
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}
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/* the "0000000000000000" is 64-bit hexadimal string */
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chunk = ngx_palloc(r->pool, sizeof("0000000000000000" CRLF) - 1);
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if (chunk == NULL) {
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return NGX_ERROR;
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}
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b->temporary = 1;
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b->pos = chunk;
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b->last = ngx_sprintf(chunk, "%xO" CRLF, size);
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out.buf = b;
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}
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if (cl->buf->last_buf) {
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b = ngx_calloc_buf(r->pool);
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if (b == NULL) {
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return NGX_ERROR;
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}
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b->memory = 1;
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b->last_buf = 1;
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b->pos = (u_char *) CRLF "0" CRLF CRLF;
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b->last = b->pos + 7;
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cl->buf->last_buf = 0;
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if (size == 0) {
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b->pos += 2;
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out.buf = b;
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out.next = NULL;
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return ngx_http_next_body_filter(r, &out);
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}
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} else {
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if (size == 0) {
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*ll = NULL;
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return ngx_http_next_body_filter(r, out.next);
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}
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b = ngx_calloc_buf(r->pool);
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if (b == NULL) {
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return NGX_ERROR;
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}
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b->memory = 1;
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b->pos = (u_char *) CRLF;
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b->last = b->pos + 2;
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}
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tail.buf = b;
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tail.next = NULL;
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*ll = &tail;
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return ngx_http_next_body_filter(r, &out);
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}
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static ngx_int_t
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ngx_http_chunked_filter_init(ngx_cycle_t *cycle)
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{
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ngx_http_next_header_filter = ngx_http_top_header_filter;
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ngx_http_top_header_filter = ngx_http_chunked_header_filter;
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ngx_http_next_body_filter = ngx_http_top_body_filter;
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ngx_http_top_body_filter = ngx_http_chunked_body_filter;
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return NGX_OK;
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}
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