1 files changed, 114 insertions, 0 deletions
diff --git a/src/HTTP/HTTPFormParser.h b/src/HTTP/HTTPFormParser.h
new file mode 100644
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+++ b/src/HTTP/HTTPFormParser.h
@@ -0,0 +1,114 @@
+
+// HTTPFormParser.h
+
+// Declares the cHTTPFormParser class representing a parser for forms sent over HTTP
+
+
+
+
+#pragma once
+
+#include "MultipartParser.h"
+
+
+
+
+
+// fwd:
+class cHTTPIncomingRequest;
+
+
+
+
+
+class cHTTPFormParser :
+	public std::map<AString, AString>,
+	public cMultipartParser::cCallbacks
+{
+public:
+	enum eKind
+	{
+		fpkURL,             ///< The form has been transmitted as parameters to a GET request
+		fpkFormUrlEncoded,  ///< The form has been POSTed or PUT, with Content-Type of "application/x-www-form-urlencoded"
+		fpkMultipart,       ///< The form has been POSTed or PUT, with Content-Type of "multipart/form-data"
+	} ;
+
+	class cCallbacks
+	{
+	public:
+		// Force a virtual destructor in descendants:
+		virtual ~cCallbacks() {}
+
+		/** Called when a new file part is encountered in the form data */
+		virtual void OnFileStart(cHTTPFormParser & a_Parser, const AString & a_FileName) = 0;
+
+		/** Called when more file data has come for the current file in the form data */
+		virtual void OnFileData(cHTTPFormParser & a_Parser, const char * a_Data, size_t a_Size) = 0;
+
+		/** Called when the current file part has ended in the form data */
+		virtual void OnFileEnd(cHTTPFormParser & a_Parser) = 0;
+	} ;
+
+
+	/** Creates a parser that is tied to a request and notifies of various events using a callback mechanism */
+	cHTTPFormParser(const cHTTPIncomingRequest & a_Request, cCallbacks & a_Callbacks);
+
+	/** Creates a parser with the specified content type that reads data from a string */
+	cHTTPFormParser(eKind a_Kind, const char * a_Data, size_t a_Size, cCallbacks & a_Callbacks);
+
+	/** Adds more data into the parser, as the request body is received */
+	void Parse(const char * a_Data, size_t a_Size);
+
+	/** Notifies that there's no more data incoming and the parser should finish its parsing.
+	Returns true if parsing successful. */
+	bool Finish(void);
+
+	/** Returns true if the headers suggest the request has form data parseable by this class */
+	static bool HasFormData(const cHTTPIncomingRequest & a_Request);
+
+protected:
+
+	/** The callbacks to call for incoming file data */
+	cCallbacks & m_Callbacks;
+
+	/** The kind of the parser (decided in the constructor, used in Parse() */
+	eKind m_Kind;
+
+	/** Buffer for the incoming data until it's parsed */
+	AString m_IncomingData;
+
+	/** True if the information received so far is a valid form; set to false on first problem. Further parsing is skipped when false. */
+	bool m_IsValid;
+
+	/** The parser for the multipart data, if used */
+	std::unique_ptr<cMultipartParser> m_MultipartParser;
+
+	/** Name of the currently parsed part in multipart data */
+	AString m_CurrentPartName;
+
+	/** True if the currently parsed part in multipart data is a file */
+	bool m_IsCurrentPartFile;
+
+	/** Filename of the current parsed part in multipart data (for file uploads) */
+	AString m_CurrentPartFileName;
+
+	/** Set to true after m_Callbacks.OnFileStart() has been called, reset to false on PartEnd */
+	bool m_FileHasBeenAnnounced;
+
+
+	/** Sets up the object for parsing a fpkMultipart request */
+	void BeginMultipart(const cHTTPIncomingRequest & a_Request);
+
+	/** Parses m_IncomingData as form-urlencoded data (fpkURL or fpkFormUrlEncoded kinds) */
+	void ParseFormUrlEncoded(void);
+
+	// cMultipartParser::cCallbacks overrides:
+	virtual void OnPartStart (void) override;
+	virtual void OnPartHeader(const AString & a_Key, const AString & a_Value) override;
+	virtual void OnPartData  (const char * a_Data, size_t a_Size) override;
+	virtual void OnPartEnd   (void) override;
+} ;
+
+
+
+