/**
* Serves a PNG file of the hash.
*/
void route_image(evhtp_request_t *req, void *arg) {
// redisReply *reply;
evhtp_uri_t *uri = req->uri;
int side = 128;
char *hash = "";
char *res = uri->path->full;
int ind = 0;
res = strtok((char *) res, "/");
while (res != NULL) {
if (ind == 0) {
if (strlen(res) == 32) {
hash = res;
} else if (strcmp(res, "avatar") == 0) {
ind--;
} else {
route_400(req);
return;
}
}
if (ind == 1) {
side = atoi(res);
if (side == 0) {
side = defsize;
} else if (side < minsize) {
side = minsize;
} else if (side > maxsize) {
side = maxsize;
}
}
res = strtok(NULL, "/");
ind++;
}
char *etag = malloc(sizeof(char) * 1024);
sprintf(etag, "\"%s-%d\"", hash, side);
evhtp_kv_t *etagin = evhtp_headers_find_header(req->headers_in, "If-None-Match");
if(etagin && strcmp(etag, etagin->val) == 0) {
free(etag);
evhtp_send_reply(req, 304);
return;
}
make_image(hash, req->buffer_out, side);
evhtp_headers_add_header(req->headers_out,
evhtp_header_new("Content-Type", "image/png", 0, 0));
evhtp_headers_add_header(req->headers_out,
evhtp_header_new("Cache-Control", "public", 0, 0));
evhtp_headers_add_header(req->headers_out,
evhtp_header_new("ETag", etag, 0, 1));
free(etag);
evhtp_send_reply(req, 200);
}
void
zxy_send_content(
zxy_request_context *context,
const std::string& content
)
{
evhtp_header_t *header = evhtp_headers_find_header(
context->request->headers_out,
"Content-Type"
);
if ( header == NULL )
{
zxy_add_http_header(context, "Content-Type", "text/html");
}
evbuffer_add(context->request->buffer_out, content.c_str(), content.size());
}
void
zxy_printf_content(
zxy_request_context *context,
const char* fmt,
...
)
{
evhtp_header_t *header = evhtp_headers_find_header(
context->request->headers_out,
"Content-Type"
);
if ( header == NULL )
{
zxy_add_http_header(context, "Content-Type", "text/html");
}
va_list args;
va_start(args, fmt);
evbuffer_add_vprintf(context->request->buffer_out, fmt, args);
va_end(args);
}
void
evhtp_send_reply_chunk_start(evhtp_request_t * request, evhtp_res code) {
evhtp_header_t * content_len;
if (evhtp_response_needs_body(code, request->method)) {
content_len = evhtp_headers_find_header(request->headers_out, "Content-Length");
switch (request->proto) {
case EVHTP_PROTO_11:
/*
* prefer HTTP/1.1 chunked encoding to closing the connection;
* note RFC 2616 section 4.4 forbids it with Content-Length:
* and it's not necessary then anyway.
*/
evhtp_kv_rm_and_free(request->headers_out, content_len);
request->chunked = 1;
break;
case EVHTP_PROTO_10:
/*
* HTTP/1.0 can be chunked as long as the Content-Length header
* is set to 0
*/
evhtp_kv_rm_and_free(request->headers_out, content_len);
evhtp_headers_add_header(request->headers_out,
evhtp_header_new("Content-Length", "0", 0, 0));
request->chunked = 1;
break;
default:
request->chunked = 0;
break;
} /* switch */
} else {
request->chunked = 0;
}
if (request->chunked == 1) {
evhtp_headers_add_header(request->headers_out,
evhtp_header_new("Transfer-Encoding", "chunked", 0, 0));
/*
* if data already exists on the output buffer, we automagically convert
* it to the first chunk.
*/
if (evbuffer_get_length(request->buffer_out) > 0) {
char lstr[128];
int sres;
sres = snprintf(lstr, sizeof(lstr), "%x\r\n",
(unsigned)evbuffer_get_length(request->buffer_out));
if (sres >= sizeof(lstr) || sres < 0) {
/* overflow condition, shouldn't ever get here, but lets
* terminate the connection asap */
goto end;
}
evbuffer_prepend(request->buffer_out, lstr, strlen(lstr));
evbuffer_add(request->buffer_out, "\r\n", 2);
}
}
end:
evhtp_send_reply_start(request, code);
} /* evhtp_send_reply_chunk_start */
