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#include "uwsgi.h"
/*
upload progress facilities
*/
extern struct uwsgi_server uwsgi;
char *uwsgi_upload_progress_create(struct wsgi_request *wsgi_req, int *fd) {
const char *x_progress_id = "X-Progress-ID=";
char *xpi_ptr = (char *) x_progress_id;
uint16_t i;
char *upload_progress_filename = NULL;
if (wsgi_req->uri_len <= 51)
return NULL;
for (i = 0; i < wsgi_req->uri_len; i++) {
if (wsgi_req->uri[i] == xpi_ptr[0]) {
if (xpi_ptr[0] == '=') {
if (wsgi_req->uri + i + 36 <= wsgi_req->uri + wsgi_req->uri_len) {
upload_progress_filename = wsgi_req->uri + i + 1;
}
break;
}
xpi_ptr++;
}
else {
xpi_ptr = (char *) x_progress_id;
}
}
// now check for valid uuid (from spec available at http://en.wikipedia.org/wiki/Universally_unique_identifier)
if (!upload_progress_filename)
return NULL;
uwsgi_log("upload progress uuid = %.*s\n", 36, upload_progress_filename);
if (!check_hex(upload_progress_filename, 8))
return NULL;
if (upload_progress_filename[8] != '-')
return NULL;
if (!check_hex(upload_progress_filename + 9, 4))
return NULL;
if (upload_progress_filename[13] != '-')
return NULL;
if (!check_hex(upload_progress_filename + 14, 4))
return NULL;
if (upload_progress_filename[18] != '-')
return NULL;
if (!check_hex(upload_progress_filename + 19, 4))
return NULL;
if (upload_progress_filename[23] != '-')
return NULL;
if (!check_hex(upload_progress_filename + 24, 12))
return NULL;
upload_progress_filename = uwsgi_concat4n(uwsgi.upload_progress, strlen(uwsgi.upload_progress), "/", 1, upload_progress_filename, 36, ".js", 3);
// here we use O_EXCL to avoid eventual application bug in uuid generation/using
*fd = open(upload_progress_filename, O_WRONLY | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR | S_IRGRP);
if (*fd < 0) {
uwsgi_error_open(upload_progress_filename);
free(upload_progress_filename);
return NULL;
}
return upload_progress_filename;
}
int uwsgi_upload_progress_update(struct wsgi_request *wsgi_req, int fd, size_t remains) {
char buf[4096];
int ret = snprintf(buf, 4096, "{ \"state\" : \"uploading\", \"received\" : %llu, \"size\" : %llu }\r\n", (unsigned long long) (wsgi_req->post_cl - remains), (unsigned long long) wsgi_req->post_cl);
if (ret <= 0 || ret >= 4096) {
return -1;
}
if (lseek(fd, 0, SEEK_SET)) {
uwsgi_error("uwsgi_upload_progress_update()/lseek()");
return -1;
}
if (write(fd, buf, ret) != ret) {
uwsgi_error("uwsgi_upload_progress_update()/write()");
return -1;
}
if (fsync(fd)) {
uwsgi_error("uwsgi_upload_progress_update()/fsync()");
return -1;
}
return 0;
}
void uwsgi_upload_progress_destroy(char *filename, int fd) {
close(fd);
if (unlink(filename)) {
uwsgi_error("uwsgi_upload_progress_destroy()/unlink()");
}
free(filename);
}
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