Added public imports to multipart module in request module, used deco…

…deComponent in multipart.

source/handy_httpd/components/multipart.d

@@ -217,7 +217,7 @@ private ulong parseElementHeaders(ref MultipartElement element, string content)
 private void parseContentDisposition(ref MultipartElement element) {
     import std.algorithm : startsWith, endsWith;
     import std.string : split, strip;
-    import std.uri : decode;
+    import std.uri : decodeComponent;
     if ("Content-Disposition" !in element.headers) {
         throw new MultipartFormatException("Missing required Content-Disposition header for multipart element.");
     }
@@ -226,11 +226,11 @@ private void parseContentDisposition(ref MultipartElement element) {
     foreach (string part; cdParts) {
         string stripped = strip(part);
         if (startsWith(stripped, "name=\"") && endsWith(stripped, "\"")) {
-            element.name = decode(stripped[6 .. $ - 1]);
+            element.name = decodeComponent(stripped[6 .. $ - 1]);
             traceF!"Element name: %s"(element.name);
         } else if (startsWith(stripped, "filename=\"") && endsWith(stripped, "\"")) {
             import std.typecons : nullable;
-            element.filename = nullable(decode(stripped[10 .. $ - 1]));
+            element.filename = nullable(decodeComponent(stripped[10 .. $ - 1]));
             traceF!"Element filename: %s"(element.filename);
         }
     }

source/handy_httpd/components/request.d

@@ -14,6 +14,9 @@ import std.exception;
 import slf4d;
 import streams;
 
+/// For convenience, provide access to multipart functionality.
+public import handy_httpd.components.multipart : readBodyAsMultipartFormData, MultipartFormData, MultipartElement;
+
 /** 
  * The data which the server provides to HttpRequestHandlers so that they can
  * formulate a response.
@@ -44,7 +47,7 @@ struct HttpRequest {
     /**
      * A list of parsed query parameters from the request's URL.
      */
-    public StringMultiValueMap queryParams;
+    public const(StringMultiValueMap) queryParams;
 
     /**
      * An associative array containing any path parameters obtained from the
@@ -85,7 +88,7 @@ struct HttpRequest {
      * Returns: True if this request has a header with the given name, or false
      * otherwise.
      */
-    public bool hasHeader(string name) {
+    public bool hasHeader(string name) const {
         return headers.contains(name);
     }
 
@@ -96,7 +99,7 @@ struct HttpRequest {
      *   name = The name of the header, case-sensitive.
      * Returns: The header's string representation, or null if not found.
      */
-    public string getHeader(string name) {
+    public string getHeader(string name) const {
         return headers.getFirst(name).orElse(null);
     }
 
@@ -129,7 +132,7 @@ struct HttpRequest {
      *                  doesn't exist.
      * Returns: The value of the URL parameter.
      */
-    public T getParamAs(T)(string name, T defaultValue = T.init) {
+    public T getParamAs(T)(string name, T defaultValue = T.init) const {
         import std.conv : to, ConvException;
         return this.queryParams.getFirst(name)
             .map!((s) {