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+
+// HTTPFormParser.h
+
+// Declares the cHTTPFormParser class representing a parser for forms sent over HTTP
+
+
+
+
+#pragma once
+
+#include "MultipartParser.h"
+
+
+
+
+
+// fwd:
+class cHTTPRequest;
+
+
+
+
+
+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:
+ /// 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, int 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(cHTTPRequest & 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, int a_Size, cCallbacks & a_Callbacks);
+
+ /// Adds more data into the parser, as the request body is received
+ void Parse(const char * a_Data, int 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 cHTTPRequest & 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::auto_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 cHTTPRequest & 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, int a_Size) override;
+ virtual void OnPartEnd (void) override;
+} ;
+
+
+
+