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authormadmaxoft <github@xoft.cz>2013-10-04 09:20:15 +0200
committermadmaxoft <github@xoft.cz>2013-10-04 13:10:30 +0200
commit58f5ac84aba8f1f95a1c39721bd18080fb3c455a (patch)
treea1a477468cb9706c8dcd446297ce764268434bf7 /source/HTTPServer
parentAdded StrToLower(), URLDecode() and ReplaceAllCharOccurrences(). (diff)
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Diffstat (limited to '')
-rw-r--r--source/HTTPServer/NameValueParser.cpp412
-rw-r--r--source/HTTPServer/NameValueParser.h70
2 files changed, 482 insertions, 0 deletions
diff --git a/source/HTTPServer/NameValueParser.cpp b/source/HTTPServer/NameValueParser.cpp
new file mode 100644
index 000000000..a27f07d19
--- /dev/null
+++ b/source/HTTPServer/NameValueParser.cpp
@@ -0,0 +1,412 @@
+
+// NameValueParser.cpp
+
+// Implements the cNameValueParser class that parses strings in the "name=value;name2=value2" format into a stringmap
+
+#include "Globals.h"
+#include "NameValueParser.h"
+
+
+
+
+
+
+// DEBUG: Self-test
+
+#if 0
+
+class cNameValueParserTest
+{
+public:
+ cNameValueParserTest(void)
+ {
+ const char Data[] = " Name1=Value1;Name2 = Value 2; Name3 =\"Value 3\"; Name4 =\'Value 4\'; Name5=\"Confusing; isn\'t it?\"";
+
+ // Now try parsing char-by-char, to debug transitions across datachunk boundaries:
+ cNameValueParser Parser2;
+ for (int i = 0; i < sizeof(Data) - 1; i++)
+ {
+ Parser2.Parse(Data + i, 1);
+ }
+ Parser2.Finish();
+
+ // Parse as a single chunk of data:
+ cNameValueParser Parser(Data, sizeof(Data) - 1);
+
+ // Use the debugger to inspect the Parser variable
+
+ // Check that the two parsers have the same content:
+ for (cNameValueParser::const_iterator itr = Parser.begin(), end = Parser.end(); itr != end; ++itr)
+ {
+ ASSERT(Parser2[itr->first] == itr->second);
+ } // for itr - Parser[]
+
+ // Try parsing in 2-char chunks:
+ cNameValueParser Parser3;
+ for (int i = 0; i < sizeof(Data) - 2; i += 2)
+ {
+ Parser3.Parse(Data + i, 2);
+ }
+ if ((sizeof(Data) % 2) == 0) // There are even number of chars, including the NUL, so the data has an odd length. Parse one more char
+ {
+ Parser3.Parse(Data + sizeof(Data) - 2, 1);
+ }
+ Parser3.Finish();
+
+ // Check that the third parser has the same content:
+ for (cNameValueParser::const_iterator itr = Parser.begin(), end = Parser.end(); itr != end; ++itr)
+ {
+ ASSERT(Parser3[itr->first] == itr->second);
+ } // for itr - Parser[]
+
+ printf("cNameValueParserTest done");
+ }
+} g_Test;
+
+#endif
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cNameValueParser:
+
+cNameValueParser::cNameValueParser(bool a_AllowsKeyOnly) :
+ m_State(psKeySpace),
+ m_AllowsKeyOnly(a_AllowsKeyOnly)
+{
+}
+
+
+
+
+
+cNameValueParser::cNameValueParser(const char * a_Data, int a_Size, bool a_AllowsKeyOnly) :
+ m_State(psKeySpace),
+ m_AllowsKeyOnly(a_AllowsKeyOnly)
+{
+ Parse(a_Data, a_Size);
+}
+
+
+
+
+
+void cNameValueParser::Parse(const char * a_Data, int a_Size)
+{
+ ASSERT(m_State != psFinished); // Calling Parse() after Finish() is wrong!
+
+ if ((m_State == psInvalid) || (m_State == psFinished))
+ {
+ return;
+ }
+ int Last = 0;
+ for (int i = 0; i < a_Size;)
+ {
+ switch (m_State)
+ {
+ case psKeySpace:
+ {
+ // Skip whitespace until a non-whitespace is found, then start the key:
+ while ((i < a_Size) && (a_Data[i] <= ' '))
+ {
+ i++;
+ }
+ if ((i < a_Size) && (a_Data[i] > ' '))
+ {
+ m_State = psKey;
+ Last = i;
+ }
+ break;
+ }
+
+ case psKey:
+ {
+ // Read the key until whitespace or an equal sign:
+ while (i < a_Size)
+ {
+ if (a_Data[i] == '=')
+ {
+ m_CurrentKey.append(a_Data + Last, i - Last);
+ i++;
+ Last = i;
+ m_State = psEqual;
+ break;
+ }
+ else if (a_Data[i] <= ' ')
+ {
+ m_CurrentKey.append(a_Data + Last, i - Last);
+ i++;
+ Last = i;
+ m_State = psEqualSpace;
+ break;
+ }
+ else if (a_Data[i] == ';')
+ {
+ if (!m_AllowsKeyOnly)
+ {
+ m_State = psInvalid;
+ return;
+ }
+ m_CurrentKey.append(a_Data + Last, i - Last);
+ i++;
+ Last = i;
+ (*this)[m_CurrentKey] = "";
+ m_CurrentKey.clear();
+ m_State = psKeySpace;
+ break;
+ }
+ else if ((a_Data[i] == '\"') || (a_Data[i] == '\''))
+ {
+ m_State = psInvalid;
+ return;
+ }
+ i++;
+ } // while (i < a_Size)
+ if (i == a_Size)
+ {
+ // Still the key, ran out of data to parse, store the part of the key parsed so far:
+ m_CurrentKey.append(a_Data + Last, a_Size - Last);
+ return;
+ }
+ break;
+ }
+
+ case psEqualSpace:
+ {
+ // The space before the expected equal sign; the current key is already assigned
+ while (i < a_Size)
+ {
+ if (a_Data[i] == '=')
+ {
+ m_State = psEqual;
+ i++;
+ Last = i;
+ break;
+ }
+ else if (a_Data[i] == ';')
+ {
+ // Key-only
+ if (!m_AllowsKeyOnly)
+ {
+ m_State = psInvalid;
+ return;
+ }
+ i++;
+ Last = i;
+ (*this)[m_CurrentKey] = "";
+ m_CurrentKey.clear();
+ m_State = psKeySpace;
+ break;
+ }
+ else if (a_Data[i] > ' ')
+ {
+ m_State = psInvalid;
+ return;
+ }
+ i++;
+ } // while (i < a_Size)
+ break;
+ } // case psEqualSpace
+
+ case psEqual:
+ {
+ // just parsed the equal-sign
+ while (i < a_Size)
+ {
+ if (a_Data[i] == ';')
+ {
+ if (!m_AllowsKeyOnly)
+ {
+ m_State = psInvalid;
+ return;
+ }
+ i++;
+ Last = i;
+ (*this)[m_CurrentKey] = "";
+ m_CurrentKey.clear();
+ m_State = psKeySpace;
+ break;
+ }
+ else if (a_Data[i] == '\"')
+ {
+ i++;
+ Last = i;
+ m_State = psValueInDQuotes;
+ break;
+ }
+ else if (a_Data[i] == '\'')
+ {
+ i++;
+ Last = i;
+ m_State = psValueInSQuotes;
+ break;
+ }
+ else
+ {
+ m_CurrentValue.push_back(a_Data[i]);
+ i++;
+ Last = i;
+ m_State = psValueRaw;
+ break;
+ }
+ i++;
+ } // while (i < a_Size)
+ break;
+ } // case psEqual
+
+ case psValueInDQuotes:
+ {
+ while (i < a_Size)
+ {
+ if (a_Data[i] == '\"')
+ {
+ m_CurrentValue.append(a_Data + Last, i - Last);
+ (*this)[m_CurrentKey] = m_CurrentValue;
+ m_CurrentKey.clear();
+ m_CurrentValue.clear();
+ m_State = psAfterValue;
+ i++;
+ Last = i;
+ break;
+ }
+ i++;
+ } // while (i < a_Size)
+ if (i == a_Size)
+ {
+ m_CurrentValue.append(a_Data + Last, a_Size - Last);
+ }
+ break;
+ } // case psValueInDQuotes
+
+ case psValueInSQuotes:
+ {
+ while (i < a_Size)
+ {
+ if (a_Data[i] == '\'')
+ {
+ m_CurrentValue.append(a_Data + Last, i - Last);
+ (*this)[m_CurrentKey] = m_CurrentValue;
+ m_CurrentKey.clear();
+ m_CurrentValue.clear();
+ m_State = psAfterValue;
+ i++;
+ Last = i;
+ break;
+ }
+ i++;
+ } // while (i < a_Size)
+ if (i == a_Size)
+ {
+ m_CurrentValue.append(a_Data + Last, a_Size - Last);
+ }
+ break;
+ } // case psValueInSQuotes
+
+ case psValueRaw:
+ {
+ while (i < a_Size)
+ {
+ if (a_Data[i] == ';')
+ {
+ m_CurrentValue.append(a_Data + Last, i - Last);
+ (*this)[m_CurrentKey] = m_CurrentValue;
+ m_CurrentKey.clear();
+ m_CurrentValue.clear();
+ m_State = psKeySpace;
+ i++;
+ Last = i;
+ break;
+ }
+ i++;
+ }
+ if (i == a_Size)
+ {
+ m_CurrentValue.append(a_Data + Last, a_Size - Last);
+ }
+ break;
+ } // case psValueRaw
+
+ case psAfterValue:
+ {
+ // Between the closing DQuote or SQuote and the terminating semicolon
+ while (i < a_Size)
+ {
+ if (a_Data[i] == ';')
+ {
+ m_State = psKeySpace;
+ i++;
+ Last = i;
+ break;
+ }
+ else if (a_Data[i] < ' ')
+ {
+ i++;
+ continue;
+ }
+ m_State = psInvalid;
+ return;
+ } // while (i < a_Size)
+ break;
+ }
+ } // switch (m_State)
+ } // for i - a_Data[]
+}
+
+
+
+
+
+bool cNameValueParser::Finish(void)
+{
+ switch (m_State)
+ {
+ case psInvalid:
+ {
+ return false;
+ }
+ case psFinished:
+ {
+ return true;
+ }
+ case psKey:
+ case psEqualSpace:
+ case psEqual:
+ {
+ if ((m_AllowsKeyOnly) && !m_CurrentKey.empty())
+ {
+ (*this)[m_CurrentKey] = "";
+ m_State = psFinished;
+ return true;
+ }
+ m_State = psInvalid;
+ return false;
+ }
+ case psValueRaw:
+ {
+ (*this)[m_CurrentKey] = m_CurrentValue;
+ m_State = psFinished;
+ return true;
+ }
+ case psValueInDQuotes:
+ case psValueInSQuotes:
+ {
+ // Missing the terminating quotes, this is an error
+ m_State = psInvalid;
+ return false;
+ }
+ case psKeySpace:
+ case psAfterValue:
+ {
+ m_State = psFinished;
+ return true;
+ }
+ }
+ ASSERT(!"Unhandled parser state!");
+ return false;
+}
+
+
+
+
diff --git a/source/HTTPServer/NameValueParser.h b/source/HTTPServer/NameValueParser.h
new file mode 100644
index 000000000..111cb6052
--- /dev/null
+++ b/source/HTTPServer/NameValueParser.h
@@ -0,0 +1,70 @@
+
+// NameValueParser.h
+
+// Declares the cNameValueParser class that parses strings in the "name=value;name2=value2" format into a stringmap
+
+
+
+
+
+#pragma once
+
+
+
+
+
+class cNameValueParser :
+ public std::map<AString, AString>
+{
+public:
+ /// Creates an empty parser
+ cNameValueParser(bool a_AllowsKeyOnly = true);
+
+ /// Creates an empty parser, then parses the data given
+ cNameValueParser(const char * a_Data, int a_Size, bool a_AllowsKeyOnly = true);
+
+ /// Parses the data given
+ void Parse(const char * a_Data, int a_Size);
+
+ /// Notifies the parser that no more data will be coming. Returns true if the parser state is valid
+ bool Finish(void);
+
+ /// Returns true if the data parsed so far was valid
+ bool IsValid(void) const { return (m_State != psInvalid); }
+
+ /// Returns true if the parser expects no more data
+ bool IsFinished(void) const { return ((m_State == psInvalid) || (m_State == psFinished)); }
+
+protected:
+ enum eState
+ {
+ psKeySpace, ///< Parsing the space in front of the next key
+ psKey, ///< Currently adding more chars to the key in m_CurrentKey
+ psEqualSpace, ///< Space after m_CurrentKey
+ psEqual, ///< Just parsed the = sign after a name
+ psValueInSQuotes, ///< Just parsed a Single-quote sign after the Equal sign
+ psValueInDQuotes, ///< Just parsed a Double-quote sign after the Equal sign
+ psValueRaw, ///< Just parsed a raw value without a quote
+ psAfterValue, ///< Just finished parsing the value, waiting for semicolon or data end
+ psInvalid, ///< The parser has encountered an invalid input; further parsing is skipped
+ psFinished, ///< The parser has already been instructed to finish and doesn't expect any more data
+ } ;
+
+ /// The current state of the parser
+ eState m_State;
+
+ /// If true, the parser will accept keys without an equal sign and the value
+ bool m_AllowsKeyOnly;
+
+ /// Buffer for the current Key
+ AString m_CurrentKey;
+
+ /// Buffer for the current Value;
+ AString m_CurrentValue;
+
+
+} ;
+
+
+
+