464 lines
11 KiB
C
464 lines
11 KiB
C
#include <event2/thread.h>
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#include "selfcare_httpsrv.h"
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#include "log.h"
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#include "selfcare_config.h"
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static selfcare_elem_s g_elems_arr[SELFCARE_TYPE_MAX];
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char uri_root[512];
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static const struct table_entry {
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const char *extension;
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const char *content_type;
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} content_type_table[] = {
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{ "txt", "text/plain" },
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{ "c", "text/plain" },
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{ "h", "text/plain" },
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{ "html", "text/html" },
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{ "htm", "text/html" },
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{ "css", "text/css" },
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{ "gif", "image/gif" },
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{ "jpg", "image/jpg" },
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{ "jpeg", "image/jpeg" },
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{ "png", "image/png" },
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{ "pdf", "application/pdf" },
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{ "ps", "application/postscript" },
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{ NULL, NULL },
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};
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/* Try to guess a good content-type for 'path' */
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const char* guess_content_type(const char *path)
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{
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const char *last_period, *extension;
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const struct table_entry *ent;
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last_period = strrchr(path, '.');
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if (!last_period || strchr(last_period, '/'))
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{
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goto not_found;
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}
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extension = last_period + 1;
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for (ent = &content_type_table[0]; ent->extension; ++ent)
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{
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if (!evutil_ascii_strcasecmp(ent->extension, extension))
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{
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return ent->content_type;
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}
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}
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not_found:
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return "application/misc";
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}
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/* Callbase used for the /dump URI, and for every non-get request:
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** dumps all information to stdout and gives base a trivial 200 ok */
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static void _httpserv_request_cb(struct evhttp_request *req, void *arg)
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{
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int ret;
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ret = selfcare_httpsrv_check(req, arg);
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if(ret != SUCCESS)
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{
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return ;
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}
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// _httpserv_queue_enter(req, arg);
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}
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/* This callback gets invoked when we get and http request than doesn't match
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* any other callback. Like any evhttp server callback, it has a simple job:
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* it must eventually call evhttp_send_error() or evhttp_send_reply().
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*/
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void _httpserv_senddoc_cb(struct evhttp_request *req, void *arg)
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{
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struct evbuffer *evb = NULL;
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const char *docroot = arg;
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const char *uri = evhttp_request_get_uri(req);
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struct evhttp_uri *decoded = NULL;
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const char *path;
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char *decoded_path;
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char *whole_path = NULL;
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size_t len;
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int fd = -1;
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struct stat st;
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if (evhttp_request_get_command(req) != EVHTTP_REQ_GET)
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{
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_httpserv_request_cb(req, arg);
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return;
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}
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LOG_D("Got a GET request for <%s>\n", uri);
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/* Decode the URI */
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decoded = evhttp_uri_parse(uri);
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if (!decoded)
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{
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LOG_E("It's not a good URI, Sneding BADREQUEST\n");
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evhttp_send_error(req, HTTP_BADREQUEST, 0);
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return;
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}
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/* Let's see what path the user asked for. */
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path = evhttp_uri_get_path(decoded);
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if (!path)
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{
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path = "/";
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}
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/* We need to decode it, to see what path the user really wanted */
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decoded_path = evhttp_uridecode(path, 0, NULL);
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if (decoded_path == NULL)
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{
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goto err;
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}
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/* Don't allow any ".."'s in the path, to avoid exposing stuff outside
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* of the docroot. This test is both overzealous and underzealous:
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* it forbids aceptable paths like "/this/one..here", but it doesn't
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* do anything to prevent symlink following. */
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if (strstr(decoded_path, ".."))
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{
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goto err;
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}
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len = strlen(decoded_path) + strlen(docroot) + 2;
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if (!(whole_path = malloc(len)))
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{
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perror("malloc");
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goto err;
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}
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evutil_snprintf(whole_path, len, "%s/%s", docroot, decoded_path);
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if (stat(whole_path, &st) < 0)
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{
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goto err;
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}
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/* This holds the content we're sending */
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evb = evbuffer_new();
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if (S_ISDIR(st.st_mode))
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{
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/* If it's a directory, read the comments and make a little index page */
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DIR *d;
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struct dirent *ent;
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const char *trailing_slash = "";
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if (!strlen(path) || path[strlen(path) - 1] != '/')
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{
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trailing_slash = "/";
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}
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if (!(d = opendir(whole_path)))
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{
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goto err;
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}
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evbuffer_add_printf(evb,
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"<!DOCTYPE html>\n"
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"<html>\n "
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" <head>\n"
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" <meta charset='utf-8'>\n"
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" <title>%s</title>\n"
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" <base href='%s%s'>\n"
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" </head>\n"
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" <body>\n"
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" <h1>%s</h1>\n"
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" <ul>\n",
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decoded_path, /* xxx html-escape this. */
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path, /* xxx html-escape this? */
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trailing_slash,
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decoded_path /* xx html-escape this */
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);
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while ((ent = readdir(d)))
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{
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const char *name = ent->d_name;
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evbuffer_add_printf(evb,
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" <li><a href=\"%s\">%s</a>\n", name, name);
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}
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evbuffer_add_printf(evb, "</ul></body></html>\n");
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closedir(d);
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evhttp_add_header(evhttp_request_get_output_headers(req),
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"Content-Type", "text/html");
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}
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else
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{
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/* Otherwise it's a file; and it to the buffer to get send via sendfile */
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const char *type = guess_content_type(decoded_path);
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if ((fd = open(whole_path, O_RDONLY)) < 0)
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{
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perror("open");
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goto err;
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}
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if (fstat(fd, &st) < 0)
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{
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/* Make sure the length still matches, now that we opened the file :/ */
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perror("fstat");
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goto err;
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}
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evhttp_add_header(evhttp_request_get_output_headers(req),
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"Content-Type", type);
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evbuffer_add_file(evb, fd, 0, st.st_size);
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}
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evhttp_send_reply(req, 200, "OK", evb);
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goto done;
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err:
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evhttp_send_error(req, 404, "Document was not found");
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if (fd >= 0)
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{
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close(fd);
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}
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done:
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if (decoded)
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{
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evhttp_uri_free(decoded);
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}
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if (decoded_path)
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{
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free(decoded_path);
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}
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if (whole_path)
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{
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free(whole_path);
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}
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if (evb)
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{
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evbuffer_free(evb);
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}
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}
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static int _httpserv_init(int argc, char **argv)
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{
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struct event_base *base;
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struct evhttp *http;
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struct evhttp_bound_socket *handle;
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if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
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{
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printf("signal error, errno[%d], error[%s]", errno, strerror(errno));
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return -1;
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}
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evthread_use_pthreads();
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base = event_base_new();
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if (!base)
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{
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printf("Couldn't create an event_base:exiting\n");
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return -1;
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}
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/* Create a new http oject to handle request */
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http = evhttp_new(base);
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if (!http)
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{
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printf("Couldn't create evhttp.Exiting\n");
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return -1;
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}
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/* The /dump URI will dump all requests to stdout and say 200 ok */
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int i;
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for(i = SELFCARE_TYPE_MIN; i < SELFCARE_TYPE_MAX; ++i)
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{
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if(g_elems_arr[i].handle != NULL)
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{
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/* ע<><D7A2><EFBFBD>ص<EFBFBD><D8B5>ϲ㶨<CFB2><E3B6A8><EFBFBD>Ļص<C4BB><D8B5><EFBFBD><EFBFBD><EFBFBD> */
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evhttp_set_cb(http, g_elems_arr[i].url_addr, g_elems_arr[i].handle, NULL);
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}
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else
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{
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/* ע<><D7A2>Ĭ<EFBFBD>ϵĻص<C4BB><D8B5><EFBFBD><EFBFBD><EFBFBD> */
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evhttp_set_cb(http, "/dump", _httpserv_request_cb, NULL);
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}
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}
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/* We want to accept arbitrary requests, so we need to set a "generic" cb
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* We can also add callbacks for specific paths */
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// evhttp_set_gencb(http, _httpserv_senddoc_cb, argv[1]);
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/* Now we teel the evhttp what port to listen on */
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handle = evhttp_bind_socket_with_handle(http, "0.0.0.0", selfcare_config_get()->http_local_port);
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if (!handle)
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{
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printf("Couldn't bind to port[%d], exiting\n", selfcare_config_get()->http_local_port);
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return -1;
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}
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{
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/* Extract and display the address we're listening on. */
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struct sockaddr_storage ss;
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evutil_socket_t fd;
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ev_socklen_t socklen = sizeof(ss);
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char addrbuf[128];
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void *inaddr;
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const char *addr;
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int got_port = -1;
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fd = evhttp_bound_socket_get_fd(handle);
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memset(&ss, 0, sizeof(ss));
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if (getsockname(fd, (struct sockaddr *)&ss, &socklen))
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{
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perror("getsockname() failed");
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return -1;
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}
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if (ss.ss_family == AF_INET)
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{
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got_port = ntohs(((struct sockaddr_in*)&ss)->sin_port);
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inaddr = &((struct sockaddr_in*)&ss)->sin_addr;
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}
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else if (ss.ss_family == AF_INET6)
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{
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got_port = ntohs(((struct sockaddr_in6*)&ss)->sin6_port);
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inaddr = &((struct sockaddr_in6*)&ss)->sin6_addr;
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}
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else
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{
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printf("Weird address family\n");
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return 1;
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}
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addr = evutil_inet_ntop(ss.ss_family, inaddr, addrbuf, sizeof(addrbuf));
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if (addr)
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{
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LOG_D("Listening on %s:%d\n", addr, got_port);
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evutil_snprintf(uri_root, sizeof(uri_root), "http://%s:%d", addr, got_port);
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}
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else
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{
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printf("evutil_inet_ntop failed\n");
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return -1;
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}
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}
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event_base_dispatch(base);
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return SUCCESS;
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}
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int selfcare_httpsrv_init(int argc, char **argv)
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{
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int ret;
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ret = _httpserv_init(argc, argv);
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return ret;
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}
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void selfcare_httpsrv_uninit(void)
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{
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}
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int selfcare_httpsrv_check(struct evhttp_request *req, void *arg)
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{
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return SUCCESS;
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const char *cmdtype;
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struct evkeyvalq *headers;
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struct evkeyval *header;
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struct evbuffer *buf;
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switch (evhttp_request_get_command(req))
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{
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case EVHTTP_REQ_GET:
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cmdtype = "GET";
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break;
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case EVHTTP_REQ_POST:
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cmdtype = "POST";
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break;
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case EVHTTP_REQ_HEAD:
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cmdtype = "HEAD";
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break;
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case EVHTTP_REQ_PUT:
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cmdtype = "PUT";
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break;
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case EVHTTP_REQ_DELETE:
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cmdtype = "DELETE";
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break;
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case EVHTTP_REQ_OPTIONS:
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cmdtype = "OPTIONS";
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break;
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case EVHTTP_REQ_TRACE:
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cmdtype = "TRACE";
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break;
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case EVHTTP_REQ_CONNECT:
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break;
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case EVHTTP_REQ_PATCH:
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cmdtype = "PATCH";
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break;
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default:
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cmdtype = "unknown";
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break;
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}
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LOG_D("Received a %s request for %s\nHeader:\n", cmdtype, evhttp_request_get_uri(req));
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headers = evhttp_request_get_input_headers(req);
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for (header = headers->tqh_first; header; header = header->next.tqe_next)
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{
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LOG_D(" %s: %s\n", header->key, header->value);
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}
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buf = evhttp_request_get_input_buffer(req);
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puts("Input data: <<<<");
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while (evbuffer_get_length(buf))
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{
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int n;
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char cbuf[128];
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n = evbuffer_remove(buf, cbuf, sizeof(cbuf));
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if (n > 0)
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{
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(void)fwrite(cbuf, 1, n, stdout);
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}
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}
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puts(">>>");
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evhttp_send_reply(req, 200, "ok", NULL);
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return SUCCESS;
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}
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int selfcare_httpsrv_reg(const selfcare_elem_s *elem)
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{
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memcpy(&g_elems_arr[elem->url_type], elem, sizeof(selfcare_elem_s));
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return SUCCESS;
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}
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int selfcare_httpsrv_send(struct evhttp_request *req, const int ret_code, char *buf)
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{
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struct evbuffer *evb = NULL;
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evb = evbuffer_new();
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evbuffer_add_printf(evb, "%s", buf);
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evhttp_add_header(evhttp_request_get_output_headers(req),
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"Content-Type", "application/json");
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evhttp_send_reply(req, ret_code, "OK", evb);
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if (evb)
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{
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evbuffer_free(evb);
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}
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return SUCCESS;
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}
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