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src/http/modules/ngx_http_chunked_filter_module.c - nginx-1.7.10
Global variables defined
Data types defined
Functions defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- #include <ngx_http.h>
- typedef struct {
- ngx_chain_t *free;
- ngx_chain_t *busy;
- } ngx_http_chunked_filter_ctx_t;
- static ngx_int_t ngx_http_chunked_filter_init(ngx_conf_t *cf);
- static ngx_http_module_t ngx_http_chunked_filter_module_ctx = {
- NULL,
- ngx_http_chunked_filter_init,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL
- };
- ngx_module_t ngx_http_chunked_filter_module = {
- NGX_MODULE_V1,
- &ngx_http_chunked_filter_module_ctx,
- NULL,
- NGX_HTTP_MODULE,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NGX_MODULE_V1_PADDING
- };
- static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
- static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
- static ngx_int_t
- ngx_http_chunked_header_filter(ngx_http_request_t *r)
- {
- ngx_http_core_loc_conf_t *clcf;
- ngx_http_chunked_filter_ctx_t *ctx;
- if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED
- || r->headers_out.status == NGX_HTTP_NO_CONTENT
- || r->headers_out.status < NGX_HTTP_OK
- || r != r->main
- || (r->method & NGX_HTTP_HEAD))
- {
- return ngx_http_next_header_filter(r);
- }
- if (r->headers_out.content_length_n == -1) {
- if (r->http_version < NGX_HTTP_VERSION_11) {
- r->keepalive = 0;
- } else {
- clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
- if (clcf->chunked_transfer_encoding) {
- r->chunked = 1;
- ctx = ngx_pcalloc(r->pool,
- sizeof(ngx_http_chunked_filter_ctx_t));
- if (ctx == NULL) {
- return NGX_ERROR;
- }
- ngx_http_set_ctx(r, ctx, ngx_http_chunked_filter_module);
- } else {
- r->keepalive = 0;
- }
- }
- }
- return ngx_http_next_header_filter(r);
- }
- static ngx_int_t
- ngx_http_chunked_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
- {
- u_char *chunk;
- off_t size;
- ngx_int_t rc;
- ngx_buf_t *b;
- ngx_chain_t *out, *cl, *tl, **ll;
- ngx_http_chunked_filter_ctx_t *ctx;
- if (in == NULL || !r->chunked || r->header_only) {
- return ngx_http_next_body_filter(r, in);
- }
- ctx = ngx_http_get_module_ctx(r, ngx_http_chunked_filter_module);
- out = NULL;
- ll = &out;
- size = 0;
- cl = in;
- for ( ;; ) {
- ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
- "http chunk: %d", ngx_buf_size(cl->buf));
- size += ngx_buf_size(cl->buf);
- if (cl->buf->flush
- || cl->buf->sync
- || ngx_buf_in_memory(cl->buf)
- || cl->buf->in_file)
- {
- tl = ngx_alloc_chain_link(r->pool);
- if (tl == NULL) {
- return NGX_ERROR;
- }
- tl->buf = cl->buf;
- *ll = tl;
- ll = &tl->next;
- }
- if (cl->next == NULL) {
- break;
- }
- cl = cl->next;
- }
- if (size) {
- tl = ngx_chain_get_free_buf(r->pool, &ctx->free);
- if (tl == NULL) {
- return NGX_ERROR;
- }
- b = tl->buf;
- chunk = b->start;
- if (chunk == NULL) {
-
- chunk = ngx_palloc(r->pool, sizeof("0000000000000000" CRLF) - 1);
- if (chunk == NULL) {
- return NGX_ERROR;
- }
- b->start = chunk;
- b->end = chunk + sizeof("0000000000000000" CRLF) - 1;
- }
- b->tag = (ngx_buf_tag_t) &ngx_http_chunked_filter_module;
- b->memory = 0;
- b->temporary = 1;
- b->pos = chunk;
- b->last = ngx_sprintf(chunk, "%xO" CRLF, size);
- tl->next = out;
- out = tl;
- }
- if (cl->buf->last_buf) {
- tl = ngx_chain_get_free_buf(r->pool, &ctx->free);
- if (tl == NULL) {
- return NGX_ERROR;
- }
- b = tl->buf;
- b->tag = (ngx_buf_tag_t) &ngx_http_chunked_filter_module;
- b->temporary = 0;
- b->memory = 1;
- b->last_buf = 1;
- b->pos = (u_char *) CRLF "0" CRLF CRLF;
- b->last = b->pos + 7;
- cl->buf->last_buf = 0;
- *ll = tl;
- if (size == 0) {
- b->pos += 2;
- }
- } else if (size > 0) {
- tl = ngx_chain_get_free_buf(r->pool, &ctx->free);
- if (tl == NULL) {
- return NGX_ERROR;
- }
- b = tl->buf;
- b->tag = (ngx_buf_tag_t) &ngx_http_chunked_filter_module;
- b->temporary = 0;
- b->memory = 1;
- b->pos = (u_char *) CRLF;
- b->last = b->pos + 2;
- *ll = tl;
- } else {
- *ll = NULL;
- }
- rc = ngx_http_next_body_filter(r, out);
- ngx_chain_update_chains(r->pool, &ctx->free, &ctx->busy, &out,
- (ngx_buf_tag_t) &ngx_http_chunked_filter_module);
- return rc;
- }
- static ngx_int_t
- ngx_http_chunked_filter_init(ngx_conf_t *cf)
- {
- ngx_http_next_header_filter = ngx_http_top_header_filter;
- ngx_http_top_header_filter = ngx_http_chunked_header_filter;
- ngx_http_next_body_filter = ngx_http_top_body_filter;
- ngx_http_top_body_filter = ngx_http_chunked_body_filter;
- return NGX_OK;
- }
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