API change for mg_start: most binary compatible across releases.

mongoose.h

@@ -29,8 +29,7 @@ struct mg_context;     // Handle for the HTTP service itself
 struct mg_connection;  // Handle for the individual connection
 
 
-// This structure contains full information about the HTTP request.
-// It is passed to the user-specified callback function as a parameter.
+// This structure contains information about the HTTP request.
 struct mg_request_info {
   char *request_method;  // "GET", "POST", etc
   char *uri;             // URL-decoded URI
@@ -40,7 +39,7 @@ struct mg_request_info {
   char *log_message;     // Mongoose error log message
   long remote_ip;        // Client's IP address
   int remote_port;       // Client's port
-  int status_code;       // HTTP status code
+  int status_code;       // HTTP reply status code
   int is_ssl;            // 1 if SSL-ed, 0 if not
   int num_headers;       // Number of headers
   struct mg_header {
@@ -49,65 +48,57 @@ struct mg_request_info {
   } http_headers[64];    // Maximum 64 headers
 };
 
-// User-defined handler function. It must return MG_SUCCESS or MG_ERROR.
+// Various events on which user-defined function is called by Mongoose.
+enum mg_event {
+  MG_NEW_REQUEST,   // New HTTP request has arrived from the client
+  MG_HTTP_ERROR,    // HTTP error must be returned to the client
+  MG_EVENT_LOG,     // Mongoose logs an event, request_info.log_message
+  MG_INIT_SSL,      // Mongoose initializes SSL. Instead of mg_connection *,
+                    // SSL context is passed to the callback function.
+};
+
+// Prototype for the user-defined function. Mongoose calls this function
+// on every event mentioned above.
+//
+// Parameters:
+//   event: which event has been triggered.
+//   conn: opaque connection handler. Could be used to read, write data to the
+//         client, etc. See functions below that accept "mg_connection *".
+//   request_info: Information about HTTP request.
 //
-// If handler returns MG_SUCCESS, that means that handler has processed the
+// Return:
+//   If handler returns non-NULL, that means that handler has processed the
 //   request by sending appropriate HTTP reply to the client. Mongoose treats
 //   the request as served.
-//
-// If callback returns MG_ERROR, that means that callback has not processed
+//   If callback returns NULL, that means that callback has not processed
 //   the request. Handler must not send any data to the client in this case.
 //   Mongoose proceeds with request handling as if nothing happened.
-//
-// NOTE: ssl_password_handler must have the following prototype:
-//      int (*)(char *, int, int, void *)
-// Refer to OpenSSL documentation for more details.
-enum mg_error_t {
-  MG_ERROR,
-  MG_SUCCESS,
-  MG_NOT_FOUND,
-  MG_BUFFER_TOO_SMALL
-};
-
-typedef enum mg_error_t (*mg_callback_t)(struct mg_connection *,
-    const struct mg_request_info *);
-
-// This structure describes Mongoose configuration.
-struct mg_config {
-  char *document_root;
-  char *index_files;
-  char *ssl_certificate;
-  char *listening_ports;
-  char *cgi_extensions;
-  char *cgi_interpreter;
-  char *cgi_environment;
-  char *ssi_extensions;
-  char *auth_domain;
-  char *protect;
-  char *global_passwords_file;
-  char *put_delete_passwords_file;
-  char *access_log_file;
-  char *error_log_file;
-  char *acl;
-  char *uid;
-  char *mime_types;
-  char *enable_directory_listing;
-  char *num_threads;
-
-  mg_callback_t new_request_handler;
-  mg_callback_t http_error_handler;
-  mg_callback_t event_log_handler;
-  mg_callback_t ssl_password_handler;
-};
+typedef void * (*mg_callback_t)(enum mg_event event,
+                                struct mg_connection *conn,
+                                struct mg_request_info *request_info);
   
 
-// Start the web server.
+// Start web server.
+//
+// Parameters:
+//   callback: user defined event handling function or NULL.
+//   options: NULL terminated list of option_name, option_value pairs that
+//            specify Mongoose configuration parameters.
+//
+// Example:
+//   const char *options[] = {
+//     "document_root", "/var/www",
+//     "listening_ports", "80,443s",
+//     NULL
+//   };
+//   struct mg_context *ctx = mg_start(&my_func, options);
+//
+// Please refer to http://code.google.com/p/mongoose/wiki/MongooseManual
+// for the list of valid option and their possible values.
 //
-// This must be the first function called by the application.
-// It creates a serving thread, and returns a context structure that
-// can be used to stop the server.
-// After calling mg_start(), configuration data must not be changed.
-struct mg_context *mg_start(const struct mg_config *);
+// Return:
+//   web server context, or NULL on error.
+struct mg_context *mg_start(mg_callback_t callback, const char **options);
 
 
 // Stop the web server.
@@ -118,6 +109,19 @@ struct mg_context *mg_start(const struct mg_config *);
 void mg_stop(struct mg_context *);
 
 
+// Get the value of particular configuration parameter.
+// The value returned is read-only. Mongoose does not allow changing
+// configuration at run time.
+// If given parameter name is not valid, NULL is returned. For valid
+// names, return value is guaranteed to be non-NULL. If parameter is not
+// set, zero-length string is returned.
+const char *mg_get_option(const struct mg_context *ctx, const char *name);
+
+
+// Return array of valid configuration options.
+const char **mg_get_valid_option_names(void);
+
+
 // Add, edit or delete the entry in the passwords file.
 //
 // This function allows an application to manipulate .htpasswd files on the
@@ -129,9 +133,9 @@ void mg_stop(struct mg_context *);
 // If password is NULL, entry is deleted.
 //
 // Return:
-//  MG_ERROR, MG_SUCCESS
-enum mg_error_t mg_modify_passwords_file(struct mg_context *ctx, 
-    const char *file_name, const char *user, const char *password);
+//   1 on success, 0 on error.
+int mg_modify_passwords_file(struct mg_context *ctx, 
+    const char *passwords_file_name, const char *user, const char *password);
 
 // Send data to the client.
 int mg_write(struct mg_connection *, const void *buf, size_t len);
@@ -160,32 +164,35 @@ const char *mg_get_header(const struct mg_connection *, const char *name);
 
 // Get a value of particular form variable.
 //
-// Either request_info->query_string or read POST data can be scanned.
-// mg_get_qsvar() is convenience method to get variable from the query string.
-// Destination buffer is guaranteed to be '\0' - terminated. In case of
-// failure, dst[0] == '\0'.
+// Parameters:
+//   data: pointer to form-uri-encoded buffer. This could be either POST data,
+//         or request_info.query_string.
+//   data_len: length of the encoded data.
+//   var_name: variable name to decode from the buffer
+//   buf: destination buffer for the decoded variable
+//   buf_len: length of the destination buffer
 //
 // Return:
-//  MG_SUCCESS    Variable value was successfully copied in the buffer.
-//  MG_NOT_FOUND  Requested variable not found.
-//  MG_BUFFER_TOO_SMALL  Destination buffer is too small to hold the value.
-enum mg_error_t mg_get_var(const char *data, size_t data_len,
-    const char *var_name, char *buf, size_t buf_len);
-enum mg_error_t mg_get_qsvar(const struct mg_request_info *,
+//   On success, length of the decoded variable.
+//   On error, -1 (variable not found, or destination buffer is too small).
+//
+// Destination buffer is guaranteed to be '\0' - terminated. In case of
+// failure, dst[0] == '\0'.
+int mg_get_var(const char *data, size_t data_len,
     const char *var_name, char *buf, size_t buf_len);
 
 // Fetch value of certain cookie variable into the destination buffer.
 //
 // Destination buffer is guaranteed to be '\0' - terminated. In case of
-// failure, dst[0] == '\0'. Note that RFC allows many occurences of the same
-// parameter. This function returns only first occurance.
+// failure, dst[0] == '\0'. Note that RFC allows many occurrences of the same
+// parameter. This function returns only first occurrence.
 //
 // Return:
-//  MG_SUCCESS    Cookie parameter was successfully copied in the buffer.
-//  MG_NOT_FOUND  Either "Cookie:" header is not present at all, or the
-//                requested parameter is not found.
-//  MG_BUFFER_TOO_SMALL  Destination buffer is too small to hold the value.
-enum mg_error_t mg_get_cookie(const struct mg_connection *,
+//   On success, value length.
+//   On error, -1 (either "Cookie:" header is not present at all, or the
+//   requested parameter is not found, or destination buffer is too small
+//   to hold the value).
+int mg_get_cookie(const struct mg_connection *,
     const char *cookie_name, char *buf, size_t buf_len);
 
 

test/test.pl

@@ -146,7 +146,7 @@ if (scalar(@ARGV) > 0 and $ARGV[0] eq 'embedded') {
 }
 
 # Make sure we load config file if no options are given
-write_file($config, "ports 12345\naccess_log access.log\n");
+write_file($config, "listening_ports 12345\naccess_log_file access.log\n");
 spawn($exe);
 my $saved_port = $port;
 $port = 12345;
@@ -156,11 +156,13 @@ unlink $config;
 kill_spawned_child();
 
 # Spawn the server on port $port
-my $cmd = "$exe -ports $port -access_log access.log -error_log debug.log ".
-"-cgi_env CGI_FOO=foo,CGI_BAR=bar,CGI_BAZ=baz " .
-"-mime_types .bar=foo/bar,.tar.gz=blah,.baz=foo " .
-"-root $root,/aiased=/etc/,/ta=$test_dir";
-$cmd .= ' -cgi_interp perl' if on_windows();
+my $cmd = "$exe -listening_ports $port -access_log_file access.log ".
+"-error_log_file debug.log ".
+"-cgi_environment CGI_FOO=foo,CGI_BAR=bar,CGI_BAZ=baz " .
+"-extra_mime_types .bar=foo/bar,.tar.gz=blah,.baz=foo " .
+'-put_delete_passwords_file test/passfile ' .
+"-document_root $root,/aiased=/etc/,/ta=$test_dir";
+$cmd .= ' -cgi_interpreter perl' if on_windows();
 spawn($cmd);
 
 # Try to overflow: Send very long request
@@ -349,15 +351,12 @@ unless (scalar(@ARGV) > 0 and $ARGV[0] eq "basic_tests") {
   $content =~ /^b:a:\w+$/gs or fail("Bad content of the passwd file");
   unlink $path;
 
-  kill_spawned_child();
   do_PUT_test();
-  #do_embedded_test();
+  kill_spawned_child();
+  do_embedded_test();
 }
 
 sub do_PUT_test {
-  $cmd .= ' -auth_PUT test/passfile';
-  spawn($cmd);
-
   my $auth_header = "Authorization: Digest  username=guest, ".
   "realm=mydomain.com, nonce=1145872809, uri=/put.txt, ".
   "response=896327350763836180c61d87578037d9, qop=auth, ".
@@ -379,16 +378,14 @@ sub do_PUT_test {
   o("PUT /put.txt HTTP/1.0\nExpect: 100-continue\nContent-Length: 4\n".
     "$auth_header\nabcd",
     "HTTP/1.1 100 Continue.+HTTP/1.1 200", 'PUT 100-Continue');
-  kill_spawned_child();
 }
 
 sub do_embedded_test {
-  my $cmd = "cc -o $embed_exe $root/embed.c mongoose.c -I. ".
-  "-DNO_SSL -lpthread -DLISTENING_PORT=\\\"$port\\\"";
+  my $cmd = "cc -W -Wall -o $embed_exe $root/embed.c mongoose.c -I. ".
+  "-pthread -DLISTENING_PORT=\\\"$port\\\"";
   if (on_windows()) {
     $cmd = "cl $root/embed.c mongoose.c /I. /nologo ".
-    "/DNO_SSL /DLISTENING_PORT=\\\"$port\\\" ".
-    "/link /out:$embed_exe.exe ws2_32.lib ";
+    "/DLISTENING_PORT=\\\"$port\\\" /link /out:$embed_exe.exe ws2_32.lib ";
   }
   print $cmd, "\n";
   system($cmd) == 0 or fail("Cannot compile embedded unit test");
@@ -415,30 +412,24 @@ sub do_embedded_test {
 
   # + in form data MUST be decoded to space
   o("POST /test_get_var HTTP/1.0\nContent-Length: 10\n\n".
-    "my_var=b+c", 'Value: \[b c\]', 'mg_get_var 7', 0);
+    "my_var=b+c", 'Value: \[b c\]', 'mg_get_var 9', 0);
 
   # Test that big POSTed vars are not truncated
   my $my_var = 'x' x 64000;
   o("POST /test_get_var HTTP/1.0\nContent-Length: 64007\n\n".
-    "my_var=$my_var", 'Value size: \[64000\]', 'mg_get_var 8', 0);
-
-  # Test PUT
-  o("PUT /put HTTP/1.0\nContent-Length: 3\n\nabc",
-    '\nabc$', 'put callback', 0);
+    "my_var=$my_var", 'Value size: \[64000\]', 'mg_get_var 10', 0);
 
   o("POST /test_get_request_info?xx=yy HTTP/1.0\nFoo: bar\n".
     "Content-Length: 3\n\na=b",
     'Method: \[POST\].URI: \[/test_get_request_info\].'.
     'HTTP version: \[1.0\].HTTP header \[Foo\]: \[bar\].'.
     'HTTP header \[Content-Length\]: \[3\].'.
-    'Query string: \[xx=yy\].POST data: \[a=b\].'.
+    'Query string: \[xx=yy\].'.
     'Remote IP: \[\d+\].Remote port: \[\d+\].'.
     'Remote user: \[\]'
     , 'request_info', 0);
   o("GET /not_exist HTTP/1.0\n\n", 'Error: \[404\]', '404 handler', 0);
   o("bad request\n\n", 'Error: \[400\]', '* error handler', 0);
-  o("GET /test_user_data HTTP/1.0\n\n",
-    'User data: \[1234\]', 'user data in callback', 0);
 #	o("GET /foo/secret HTTP/1.0\n\n",
 #		'401 Unauthorized', 'mg_protect_uri', 0);
 #	o("GET /foo/secret HTTP/1.0\nAuthorization: Digest username=bill\n\n",
@@ -446,12 +437,6 @@ sub do_embedded_test {
 #	o("GET /foo/secret HTTP/1.0\nAuthorization: Digest username=joe\n\n",
 #		'200 OK', 'mg_protect_uri (joe)', 0);
 
-  # Test un-binding the URI
-  o("GET /foo/bar HTTP/1.0\n\n", 'HTTP/1.1 200 OK', '/foo bound', 0);
-  o("GET /test_remove_callback HTTP/1.0\n\n",
-    'Removing callbacks', 'Callback removal', 0);
-  o("GET /foo/bar HTTP/1.0\n\n", 'HTTP/1.1 404', '/foo unbound', 0);
-
   kill_spawned_child();
 }