lighttpd 1.4.x https://www.lighttpd.net/
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/**
* the HTTP chunk-API
*
*
*/
#include "server.h"
#include "chunk.h"
#include "http_chunk.h"
#include "log.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
static int http_chunk_append_len(server *srv, connection *con, size_t len) {
size_t i, olen = len, j;
buffer *b;
b = srv->tmp_chunk_len;
if (len == 0) {
buffer_copy_string_len(b, CONST_STR_LEN("0"));
} else {
for (i = 0; i < 8 && len; i++) {
len >>= 4;
}
/* i is the number of hex digits we have */
buffer_prepare_copy(b, i + 1);
for (j = i-1, len = olen; j+1 > 0; j--) {
b->ptr[j] = (len & 0xf) + (((len & 0xf) <= 9) ? '0' : 'a' - 10);
len >>= 4;
}
b->used = i;
b->ptr[b->used++] = '\0';
}
buffer_append_string_len(b, CONST_STR_LEN("\r\n"));
chunkqueue_append_buffer(con->write_queue, b);
return 0;
}
int http_chunk_append_file(server *srv, connection *con, buffer *fn, off_t offset, off_t len) {
chunkqueue *cq;
if (!con) return -1;
cq = con->write_queue;
if (con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED) {
http_chunk_append_len(srv, con, len);
}
chunkqueue_append_file(cq, fn, offset, len);
if (con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED && len > 0) {
chunkqueue_append_mem(cq, "\r\n", 2 + 1);
}
return 0;
}
int http_chunk_append_buffer(server *srv, connection *con, buffer *mem) {
chunkqueue *cq;
if (!con) return -1;
cq = con->write_queue;
if (con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED) {
http_chunk_append_len(srv, con, mem->used - 1);
}
chunkqueue_append_buffer(cq, mem);
if (con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED && mem->used > 0) {
chunkqueue_append_mem(cq, "\r\n", 2 + 1);
}
return 0;
}
int http_chunk_append_mem(server *srv, connection *con, const char * mem, size_t len) {
chunkqueue *cq;
if (!con) return -1;
cq = con->write_queue;
if (len == 0) {
if (con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED) {
chunkqueue_append_mem(cq, "0\r\n\r\n", 5 + 1);
} else {
chunkqueue_append_mem(cq, "", 1);
}
return 0;
}
if (con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED) {
http_chunk_append_len(srv, con, len - 1);
}
chunkqueue_append_mem(cq, mem, len);
if (con->response.transfer_encoding & HTTP_TRANSFER_ENCODING_CHUNKED) {
chunkqueue_append_mem(cq, "\r\n", 2 + 1);
}
return 0;
}
off_t http_chunkqueue_length(server *srv, connection *con) {
if (!con) {
log_error_write(srv, __FILE__, __LINE__, "s", "connection is NULL!!");
return 0;
}
return chunkqueue_length(con->write_queue);
}