kann jetzt Temperatur empfangen

1 files changed, 31 insertions, 9 deletions

diff --git a/input_gadgets.c b/input_gadgets.c
index 35dc766..3bb7113 100644
--- a/input_gadgets.c
+++ b/input_gadgets.c
@@ -1,11 +1,11 @@
 #include <string.h>
 #include <stdlib.h>
 #include <curl/curl.h>
+#include <regex.h>
 
-struct MemoryStruct {
-  char *memory;
-  size_t size;
-};
+#include "input_gadgets.h"
+
+#define temperatur_regex  ">Temperatur</td>\\s*\n\\s*<td [^>]*><strong>([^<]*)</strong>"
 
 static size_t
 WriteMemoryCallback(void *contents, size_t size, size_t nmemb, void *userp)
@@ -28,10 +28,12 @@ WriteMemoryCallback(void *contents, size_t size, size_t nmemb, void *userp)
   return realsize;
 }
 
-int gadgets_retrieve_temperature() {
+int gadgets_retrieve_temperature()
+{
   CURL *curl_handle;
   CURLcode res;
   struct MemoryStruct chunk;
+  int ret_val;
 
   chunk.memory = malloc(1);
   chunk.size = 0;
@@ -41,7 +43,7 @@ int gadgets_retrieve_temperature() {
   curl_handle = curl_easy_init();
   if (!curl_handle) {
     perror("Failed to init curl");
-    return -1;
+    return EXIT_FAILURE;
   }
   curl_easy_setopt(curl_handle, CURLOPT_URL, "https://wetter.mb.fh-jena.de/station/datenbank/php_giese/online.php");
   curl_easy_setopt(curl_handle, CURLOPT_FOLLOWLOCATION, 1L);
@@ -49,9 +51,29 @@ int gadgets_retrieve_temperature() {
   curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, (void *)&chunk);
   curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, "libcurl-agent/1.0");
   res = curl_easy_perform(curl_handle);
-  if (res != CURLE_OK)
-    fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
   curl_easy_cleanup(curl_handle);
-  printf("%lu bytes retrieved\n", (unsigned long)chunk.size);
+  if (res != CURLE_OK) {
+    fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
+    return EXIT_FAILURE;
+  }
+
+  regex_t re;
+  regmatch_t rm[2];
+  if (regcomp(&re, temperatur_regex, REG_EXTENDED|REG_NEWLINE) != 0)
+  {
+    fprintf(stderr, "Failed to compile regex '%s'\n", temperatur_regex);
+    return EXIT_FAILURE;
+  }
+  if (ret_val = regexec(&re, chunk.memory, 2, rm, 0))
+  {
+    char *reg_err;
+    reg_err = malloc(1024);
+    regerror(ret_val, &re, reg_err, 1024);
+    printf("%d %s\n",ret_val,reg_err);
+    regfree(&re);
+    return -1;
+  }
+  regfree(&re);
+  printf("Text: <<%.*s>>\n", (int)(rm[1].rm_eo - rm[1].rm_so), chunk.memory + rm[1].rm_so);
   return 0;
 }