* Multipart form content length calculation

* HTMLForm test

Net/include/Poco/Net/FilePartSource.h

@@ -83,7 +83,11 @@ public:
 	const std::string& filename() const;
 		/// Returns the filename portion of the path.
 
+	std::streamsize getContentLength() const;
+		/// Returns the file size.
+
 private:
+	std::string _path;
 	std::string _filename;
 	Poco::FileInputStream _istr;
 };

Net/include/Poco/Net/HTMLForm.h

@@ -173,7 +173,14 @@ public:
 		/// Otherwise, if the request's HTTP version is HTTP/1.1:
 		///    - the request's persistent connection state is left unchanged
 		///    - the content transfer encoding is set to chunked
-		
+
+
+	std::streamsize calculateContentLength();
+		/// Calculate the content length for the form.
+		/// May be UNKNOWN_CONTENT_LENGTH if not possible
+		/// to calculate
+
+
 	void write(std::ostream& ostr, const std::string& boundary);
 		/// Writes the form data to the given output stream,
 		/// using the specified encoding.
@@ -203,6 +210,7 @@ public:
 	static const std::string ENCODING_URL;       /// "application/x-www-form-urlencoded"
 	static const std::string ENCODING_MULTIPART; /// "multipart/form-data"
 
+	static const int         UNKNOWN_CONTENT_LENGTH;
 protected:
 	void readUrl(std::istream& istr);
 	void readMultipart(std::istream& istr, PartHandler& handler);

Net/include/Poco/Net/PartSource.h

@@ -77,9 +77,15 @@ public:
 		/// Returns a MessageHeader containing additional header
 		/// fields for the part.
 
+	virtual std::streamsize getContentLength() const;
+		/// Returns the content length for this part
+		/// which may be UNKNOWN_CONTENT_LENGTH if
+		/// not available.
+
 	virtual ~PartSource();
 		/// Destroys the PartSource.
 	
+	static const int         UNKNOWN_CONTENT_LENGTH;
 protected:
 	PartSource();
 		/// Creates the PartSource, using

Net/include/Poco/Net/StringPartSource.h

@@ -75,6 +75,9 @@ public:
 	const std::string& filename() const;
 		/// Returns the filename portion of the path.
 
+	std::streamsize getContentLength() const;
+		/// Returns the string size.
+
 private:
 	std::istringstream _istr;
 	std::string        _filename;