aka-z · December 18, 2019 03:53 · Dec 5, 2012 · Aug 5, 2012 · Jul 31, 2012 · Jul 31, 2012
diff --git a/libwebsockets-webserver.c b/libwebsockets-webserver.c
@@ -1,4 +1,3 @@
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -27,6 +26,7 @@ static int callback_http(struct libwebsocket_context *context,
                 // http://git.warmcat.com/cgi-bin/cgit/libwebsockets/tree/lib/libwebsockets.h#n597
                 libwebsocket_write(wsi, universal_response,
                                    strlen(universal_response), LWS_WRITE_HTTP);
+                break;
 
             } else {
                 // try to get current working directory

diff --git a/libwebsockets-webserver.c b/libwebsockets-webserver.c
@@ -25,7 +25,8 @@ static int callback_http(struct libwebsocket_context *context,
             if (strcmp(requested_uri, "/") == 0) {
                 void *universal_response = "Hello, World!";
                 // http://git.warmcat.com/cgi-bin/cgit/libwebsockets/tree/lib/libwebsockets.h#n597
-                libwebsocket_write(wsi, universal_response, strlen(universal_response), LWS_WRITE_HTTP);
+                libwebsocket_write(wsi, universal_response,
+                                   strlen(universal_response), LWS_WRITE_HTTP);
 
             } else {
                 // try to get current working directory
@@ -35,14 +36,18 @@ static int callback_http(struct libwebsocket_context *context,
                 if (getcwd(cwd, sizeof(cwd)) != NULL) {
                     // allocate enough memory for the resource path
                     resource_path = malloc(strlen(cwd) + strlen(requested_uri));
+
                     // join current working direcotry to the resource path
                     sprintf(resource_path, "%s%s", cwd, requested_uri);
+                    printf("resource path: %s\n", resource_path);
 
                     char *extension = strrchr(resource_path, '.');
+                    char *mime;
 
                     // choose mime type based on the file extension
-                    char *mime;
-                    if (strcmp(extension, ".png") == 0) {
+                    if (extension == NULL) {
+                        mime = "text/plain";
+                    } else if (strcmp(extension, ".png") == 0) {
                         mime = "image/png";
                     } else if (strcmp(extension, ".jpg") == 0) {
                         mime = "image/jpg";
@@ -66,7 +71,8 @@ static int callback_http(struct libwebsocket_context *context,
             }
 
             // close connection
-            libwebsocket_close_and_free_session(context, wsi, LWS_CLOSE_STATUS_NORMAL);
+            libwebsocket_close_and_free_session(context, wsi,
+                                                LWS_CLOSE_STATUS_NORMAL);
             break;
         }
         default:
@@ -95,7 +101,7 @@ static struct libwebsocket_protocols protocols[] = {
 
 int main(void) {
     // server url will be http://localhost:7681
-    int port = 7681;
+    int port = 8080;
     const char *interface = NULL;
     struct libwebsocket_context *context;
      // we're not using ssl
@@ -116,13 +122,15 @@ int main(void) {
 
     printf("starting server...\n");
 
-    // infinite loop, the only option to end this serer is by sending SIGTERM. (CTRL+C)
+    // infinite loop, the only option to end this serer is
+    // by sending SIGTERM. (CTRL+C)
     while (1) {
         libwebsocket_service(context, 50);
-        // libwebsocket_service will process all waiting events with their callback
-        // functions and then wait 50 ms.
+        // libwebsocket_service will process all waiting events with their
+        // callback functions and then wait 50 ms.
         // (this is single threaded webserver and this will keep
-        // our server from generating load while there are not requests to process)
+        // our server from generating load while there are not
+        // requests to process)
     }
 
     libwebsocket_context_destroy(context);

diff --git a/libwebsockets-webserver.c b/libwebsockets-webserver.c
@@ -70,7 +70,7 @@ static int callback_http(struct libwebsocket_context *context,
             break;
         }
         default:
-            printf("Unhandled callback\n");
+            printf("unhandled callback\n");
             break;
     }
 
@@ -94,7 +94,6 @@ static struct libwebsocket_protocols protocols[] = {
 };
 
 int main(void) {
-
     // server url will be http://localhost:7681
     int port = 7681;
     const char *interface = NULL;
@@ -105,7 +104,7 @@ int main(void) {
     // no special options
     int opts = 0;
 
-
+    // create libwebsocket context representing this server
     context = libwebsocket_create_context(port, interface, protocols,
                                           libwebsocket_internal_extensions,
                                           cert_path, key_path, -1, -1, opts);
@@ -115,12 +114,15 @@ int main(void) {
         return -1;
     }
 
-    printf("Starting...\n");
-
-
+    printf("starting server...\n");
 
+    // infinite loop, the only option to end this serer is by sending SIGTERM. (CTRL+C)
     while (1) {
         libwebsocket_service(context, 50);
+        // libwebsocket_service will process all waiting events with their callback
+        // functions and then wait 50 ms.
+        // (this is single threaded webserver and this will keep
+        // our server from generating load while there are not requests to process)
     }
 
     libwebsocket_context_destroy(context);

diff --git a/libwebsockets-webserver.c b/libwebsockets-webserver.c
@@ -0,0 +1,129 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <libwebsockets.h>
+
+
+static int callback_http(struct libwebsocket_context *context,
+                         struct libwebsocket *wsi,
+                         enum libwebsocket_callback_reasons reason, void *user,
+                         void *in, size_t len)
+{
+
+    switch (reason) {
+        // http://git.warmcat.com/cgi-bin/cgit/libwebsockets/tree/lib/libwebsockets.h#n260
+        case LWS_CALLBACK_CLIENT_WRITEABLE:
+            printf("connection established\n");
+
+        // http://git.warmcat.com/cgi-bin/cgit/libwebsockets/tree/lib/libwebsockets.h#n281
+        case LWS_CALLBACK_HTTP: {
+            char *requested_uri = (char *) in;
+            printf("requested URI: %s\n", requested_uri);
+
+            if (strcmp(requested_uri, "/") == 0) {
+                void *universal_response = "Hello, World!";
+                // http://git.warmcat.com/cgi-bin/cgit/libwebsockets/tree/lib/libwebsockets.h#n597
+                libwebsocket_write(wsi, universal_response, strlen(universal_response), LWS_WRITE_HTTP);
+
+            } else {
+                // try to get current working directory
+                char cwd[1024];
+                char *resource_path;
+
+                if (getcwd(cwd, sizeof(cwd)) != NULL) {
+                    // allocate enough memory for the resource path
+                    resource_path = malloc(strlen(cwd) + strlen(requested_uri));
+                    // join current working direcotry to the resource path
+                    sprintf(resource_path, "%s%s", cwd, requested_uri);
+
+                    char *extension = strrchr(resource_path, '.');
+
+                    // choose mime type based on the file extension
+                    char *mime;
+                    if (strcmp(extension, ".png") == 0) {
+                        mime = "image/png";
+                    } else if (strcmp(extension, ".jpg") == 0) {
+                        mime = "image/jpg";
+                    } else if (strcmp(extension, ".gif") == 0) {
+                        mime = "image/gif";
+                    } else if (strcmp(extension, ".html") == 0) {
+                        mime = "text/html";
+                    } else if (strcmp(extension, ".css") == 0) {
+                        mime = "text/css";
+                    } else {
+                        mime = "text/plain";
+                    }
+
+                    // by default non existing resources return code 400
+                    // for more information how this function handles headers
+                    // see it's source code
+                    // http://git.warmcat.com/cgi-bin/cgit/libwebsockets/tree/lib/parsers.c#n1896
+                    libwebsockets_serve_http_file(wsi, resource_path, mime);
+
+                }
+            }
+
+            // close connection
+            libwebsocket_close_and_free_session(context, wsi, LWS_CLOSE_STATUS_NORMAL);
+            break;
+        }
+        default:
+            printf("Unhandled callback\n");
+            break;
+    }
+
+    return 0;
+}
+
+/* list of supported protocols and callbacks */
+
+static struct libwebsocket_protocols protocols[] = {
+    /* first protocol must always be HTTP handler */
+
+    {
+        "http-only",    /* name */
+        callback_http,  /* callback */
+        0               /* per_session_data_size */
+    },
+    {
+        NULL, NULL, 0   /* End of list */
+    }
+
+};
+
+int main(void) {
+
+    // server url will be http://localhost:7681
+    int port = 7681;
+    const char *interface = NULL;
+    struct libwebsocket_context *context;
+     // we're not using ssl
+    const char *cert_path = NULL;
+    const char *key_path = NULL;
+    // no special options
+    int opts = 0;
+
+
+    context = libwebsocket_create_context(port, interface, protocols,
+                                          libwebsocket_internal_extensions,
+                                          cert_path, key_path, -1, -1, opts);
+
+    if (context == NULL) {
+        fprintf(stderr, "libwebsocket init failed\n");
+        return -1;
+    }
+
+    printf("Starting...\n");
+
+
+
+    while (1) {
+        libwebsocket_service(context, 50);
+    }
+
+    libwebsocket_context_destroy(context);
+
+    return 0;
+}