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webapi_serve.c
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webapi_serve.c
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/*
* Copyright (c) 2012, Toby Jaffey <toby@sensemote.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <common/common.h>
#include <common/logging.h>
#include <common/util.h>
#include <common/cJSON.h>
#include <common/path.h>
#include "mqtthttpd.h"
#include "httpd.h"
#include "webapi.h"
#include "webapi_serve.h"
#include "httpdconnlist.h"
#include "accesslog.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/limits.h>
#include <uriparser/Uri.h>
#define DEFAULT_FILENAME "index.html"
extern server_context_t g_srvctx;
/*************** mimetype handling */
typedef struct
{
const char *ext;
const char *mime;
} filext_t;
static filext_t extensions[] =
{
{".html", "text/html"},
{".js", "application/x-javascript"},
{".css", "text/css"},
{".gif", "image/gif"},
{".png", "image/png"},
{".svg", "image/svg+xml"},
{".mpg", "video/mpeg"},
{".c", "text/plain"},
{".h", "text/plain"},
{".gz", "text/plain"},
{".zip", "text/plain"},
{NULL, "text/plain"}
};
static const char *lookup_mimetype(const char *filename)
{
filext_t *p = extensions;
while(p->ext != NULL)
{
if (NULL != strcasestr(filename, p->ext))
break;
p++;
}
return p->mime;
}
/************************************/
int webapi_serve(uint32_t connid, uint32_t method, int argc, char **argv, const char *body, const char *reqpath, int vhost)
{
int fd = -1;
size_t count;
ebb_connection *conn;
ebb_connection_info *conninfo = NULL;
struct stat st;
char path[PATH_MAX];
uint8_t buf[512];
const char *rfc1123fmt = "%a, %d %b %Y %H:%M:%S GMT";
char reqpath_fname[4096];
LOG_DEBUG("webapi_serve %s", reqpath);
if (strlen(reqpath) > sizeof(reqpath_fname)/2) // FIXME
{
LOG_INFO("path too long");
return 1;
}
if (0 != uriUriStringToUnixFilenameA(reqpath, reqpath_fname))
{
LOG_INFO("bad req %s", reqpath);
return 1;
}
reqpath = reqpath_fname;
if (NULL == (conn = httpdconnlist_find(connid)))
{
LOG_WARN("no such connid %d", connid);
goto fail;
}
conninfo = (ebb_connection_info *)(conn->data);
if (NULL == conninfo)
goto fail;
if (method != EBB_GET)
goto fail;
if (NULL == reqpath || reqpath[0] == 0)
reqpath = "/";
if (vhost < 0)
{
snprintf(path, sizeof(path), "%s%s", g_srvctx.httpd_root, reqpath);
if (!path_in_dir(g_srvctx.httpd_root, path))
{
LOG_DEBUG("request for %s out of root (%s)", path, g_srvctx.httpd_root);
goto fail;
}
}
else
{
snprintf(path, sizeof(path), "%s%s", g_srvctx.vhttpd[vhost].rootdir, reqpath);
if (!path_in_dir(g_srvctx.vhttpd[vhost].rootdir, path))
{
LOG_DEBUG("request for %s out of root (%s)", path, g_srvctx.vhttpd[vhost].rootdir);
goto fail;
}
}
if ((fd = open(path, O_RDONLY)) < 0)
goto fail;
if (fstat(fd, &st) < 0)
goto fail;
if (S_ISDIR(st.st_mode))
{
char path2[PATH_MAX];
strcpy(path2, path);
snprintf(path, sizeof(path), "%s%s", path2, DEFAULT_FILENAME);
close(fd);
fd = -1;
if (vhost < 0)
{
if (!path_in_dir(g_srvctx.httpd_root, path))
{
LOG_DEBUG("request for %s out of root", path);
goto fail;
}
}
else
{
if (!path_in_dir(g_srvctx.vhttpd[vhost].rootdir, path))
{
LOG_DEBUG("request for %s out of root", path);
goto fail;
}
}
if ((fd = open(path, O_RDONLY)) < 0)
goto fail;
if (fstat(fd, &st) < 0)
goto fail;
}
if(!S_ISREG(st.st_mode))
goto fail;
strcpy(conninfo->mimetype, lookup_mimetype(path));
// fill out a last-modified header
strftime( conninfo->last_modified, sizeof(conninfo->last_modified), rfc1123fmt, localtime( &st.st_mtime ) );
if (st.st_mtime <= conninfo->ifmodifiedsince && conninfo->ifmodifiedsince != 0)
{
// LOG_INFO("not modified since ifms=%u mtime=%u", conninfo->ifmodifiedsince, st.st_mtime);
conninfo->http_status = 304; // not modified
LOG_DEBUG("not modified %s", path);
httpd_close(connid);
if (fd != 1)
close(fd);
return 0;
}
while((count = read(fd, buf, sizeof(buf)-1)) > 0)
httpd_pushbin(connid, buf, count, false);
httpd_close(connid);
LOG_DEBUG("served %s", path);
accesslog_write("%s %s %s", conninfo->ipaddr, path, reqpath);
if (fd != -1)
close(fd);
return 0;
fail:
if (fd != -1)
close(fd);
if (NULL != conninfo)
conninfo->http_status = 404; // not found
return 1;
}