Rewritten HTTPServer to split into cHTTPConnection, cHTTPRequest and cHTTPResponse classes.
This commit is contained in:
madmaxoft
@@ -0,0 +1,285 @@
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// HTTPMessage.cpp
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// Declares the cHTTPMessage class representing the common ancestor for HTTP request and response classes
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#include "Globals.h"
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#include "HTTPMessage.h"
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// cHTTPMessage:
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cHTTPMessage::cHTTPMessage(eKind a_Kind) :
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m_Kind(a_Kind)
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{
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}
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void cHTTPMessage::AddHeader(const AString & a_Key, const AString & a_Value)
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{
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cNameValueMap::iterator itr = m_Headers.find(a_Key);
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if (itr == m_Headers.end())
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{
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m_Headers[a_Key] = a_Value;
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}
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else
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{
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// The header-field key is specified multiple times, combine into comma-separated list (RFC 2616 @ 4.2)
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itr->second.append(", ");
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itr->second.append(a_Value);
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}
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// Special processing for well-known headers:
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if (a_Key == "Content-Type")
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{
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m_ContentType = m_Headers["Content-Type"];
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}
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else if (a_Key == "Content-Length")
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{
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m_ContentLength = atoi(m_Headers["Content-Length"].c_str());
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}
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// cHTTPRequest:
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cHTTPRequest::cHTTPRequest(void) :
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super(mkRequest)
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{
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}
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bool cHTTPRequest::ParseHeaders(const char * a_IncomingData, size_t a_IdxEnd)
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{
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// The first line contains the method and the URL:
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size_t Next = ParseRequestLine(a_IncomingData, a_IdxEnd);
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if (Next == AString::npos)
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{
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return false;
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}
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// The following lines contain headers:
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AString Key;
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const char * Data = a_IncomingData + Next;
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size_t End = a_IdxEnd - Next;
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while (End > 0)
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{
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Next = ParseHeaderField(Data, End, Key);
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if (Next == AString::npos)
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{
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return false;
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}
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ASSERT(End >= Next);
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Data += Next;
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End -= Next;
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}
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return HasReceivedContentLength();
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}
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size_t cHTTPRequest::ParseRequestLine(const char * a_Data, size_t a_IdxEnd)
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{
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// Ignore the initial CRLFs (HTTP spec's "should")
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size_t LineStart = 0;
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while (
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(LineStart < a_IdxEnd) &&
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(
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(a_Data[LineStart] == '\r') ||
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(a_Data[LineStart] == '\n')
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)
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)
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{
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LineStart++;
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}
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if (LineStart >= a_IdxEnd)
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{
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return AString::npos;
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}
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size_t Last = LineStart;
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int NumSpaces = 0;
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for (size_t i = LineStart; i < a_IdxEnd; i++)
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{
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switch (a_Data[i])
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{
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case ' ':
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{
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switch (NumSpaces)
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{
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case 0:
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{
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m_Method.assign(a_Data, Last, i - Last - 1);
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break;
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}
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case 1:
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{
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m_URL.assign(a_Data, Last, i - Last - 1);
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break;
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}
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default:
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{
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// Too many spaces in the request
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return AString::npos;
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}
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}
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Last = i + 1;
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NumSpaces += 1;
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break;
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}
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case '\n':
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{
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if ((i == 0) || (a_Data[i] != '\r') || (NumSpaces != 2) || (i < Last + 7))
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{
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// LF too early, without a CR, without two preceeding spaces or too soon after the second space
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return AString::npos;
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}
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// Check that there's HTTP/version at the end
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if (strncmp(a_Data + Last, "HTTP/1.", 7) != 0)
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{
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return AString::npos;
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}
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return i;
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}
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} // switch (a_Data[i])
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} // for i - a_Data[]
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return AString::npos;
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}
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size_t cHTTPRequest::ParseHeaderField(const char * a_Data, size_t a_IdxEnd, AString & a_Key)
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{
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if (*a_Data <= ' ')
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{
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size_t res = ParseHeaderFieldContinuation(a_Data + 1, a_IdxEnd - 1, a_Key);
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return (res == AString::npos) ? res : (res + 1);
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}
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size_t ValueIdx = 0;
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AString Key;
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for (size_t i = 0; i < a_IdxEnd; i++)
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{
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switch (a_Data[i])
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{
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case '\n':
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{
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if ((ValueIdx == 0) || (i < ValueIdx - 2) || (i == 0) || (a_Data[i - 1] != '\r'))
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{
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// Invalid header field - no colon or no CR before LF
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return AString::npos;
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}
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AString Value(a_Data, ValueIdx + 1, i - ValueIdx - 2);
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AddHeader(Key, Value);
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a_Key = Key;
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return i + 1;
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}
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case ':':
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{
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if (ValueIdx == 0)
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{
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Key.assign(a_Data, 0, i);
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ValueIdx = i;
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}
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break;
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}
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case ' ':
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case '\t':
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{
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if (ValueIdx == i - 1)
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{
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// Value has started in this char, but it is whitespace, so move the start one char further
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ValueIdx = i;
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}
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}
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} // switch (char)
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} // for i - m_IncomingHeaderData[]
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// No header found, return the end-of-data index:
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return a_IdxEnd;
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}
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size_t cHTTPRequest::ParseHeaderFieldContinuation(const char * a_Data, size_t a_IdxEnd, AString & a_Key)
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{
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size_t Start = 0;
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for (size_t i = 0; i < a_IdxEnd; i++)
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{
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if ((a_Data[i] > ' ') && (Start == 0))
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{
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Start = i;
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}
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else if (a_Data[i] == '\n')
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{
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if ((i == 0) || (a_Data[i - 1] != '\r'))
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{
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// There wasn't a CR before this LF
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return AString::npos;
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}
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AString Value(a_Data, 0, i - Start - 1);
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AddHeader(a_Key, Value);
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return i + 1;
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}
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}
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// LF not found, how? We found it at the header end (CRLFCRLF)
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ASSERT(!"LF not found, wtf?");
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return AString::npos;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// cHTTPResponse:
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cHTTPResponse::cHTTPResponse(void) :
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super(mkResponse)
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{
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}
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void cHTTPResponse::AppendToData(AString & a_DataStream) const
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{
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a_DataStream.append("200 OK\r\nTransfer-Encoding: chunked\r\nContent-Type: ");
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a_DataStream.append(m_ContentType);
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a_DataStream.append("\r\n");
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for (cNameValueMap::const_iterator itr = m_Headers.begin(), end = m_Headers.end(); itr != end; ++itr)
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{
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if ((itr->first == "Content-Type") || (itr->first == "Content-Length"))
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{
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continue;
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}
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a_DataStream.append(itr->first);
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a_DataStream.append(": ");
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a_DataStream.append(itr->second);
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a_DataStream.append("\r\n");
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} // for itr - m_Headers[]
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a_DataStream.append("\r\n");
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}
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@@ -0,0 +1,121 @@
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// HTTPMessage.h
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// Declares the cHTTPMessage class representing the common ancestor for HTTP request and response classes
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#pragma once
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class cHTTPMessage
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{
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public:
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enum
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{
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HTTP_OK = 200,
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HTTP_BAD_REQUEST = 400,
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} ;
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enum eKind
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{
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mkRequest,
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mkResponse,
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} ;
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cHTTPMessage(eKind a_Kind);
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/// Adds a header into the internal map of headers. Recognizes special headers: Content-Type and Content-Length
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void AddHeader(const AString & a_Key, const AString & a_Value);
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void SetContentType (const AString & a_ContentType) { m_ContentType = a_ContentType; }
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void SetContentLength(int a_ContentLength) { m_ContentLength = a_ContentLength; }
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const AString & GetContentType (void) const { return m_ContentType; }
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int GetContentLength(void) const { return m_ContentLength; }
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protected:
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typedef std::map<AString, AString> cNameValueMap;
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eKind m_Kind;
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cNameValueMap m_Headers;
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/// Type of the content; parsed by AddHeader(), set directly by SetContentLength()
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AString m_ContentType;
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/// Length of the content that is to be received. -1 when the object is created, parsed by AddHeader() or set directly by SetContentLength()
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int m_ContentLength;
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} ;
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class cHTTPRequest :
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public cHTTPMessage
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{
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typedef cHTTPMessage super;
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public:
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cHTTPRequest(void);
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/// Parses the headers information from the received data in the specified string of incoming data. Returns true if successful.
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bool ParseHeaders(const char * a_IncomingData, size_t a_idxEnd);
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/// Returns true if the request did contain a Content-Length header
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bool HasReceivedContentLength(void) const { return (m_ContentLength >= 0); }
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protected:
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/// Method of the request (GET / PUT / POST / ...)
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AString m_Method;
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/// Full URL of the request
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AString m_URL;
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/// Number of bytes that remain to read for the complete body of the message to be received
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int m_BodyRemaining;
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/** Parses the RequestLine out of a_Data, up to index a_IdxEnd
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Returns the index to the next line, or npos if invalid request
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*/
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size_t ParseRequestLine(const char * a_Data, size_t a_IdxEnd);
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/** Parses one header field out of a_Data, up to offset a_IdxEnd.
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Returns the index to the next line (relative to a_Data), or npos if invalid request.
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a_Key is set to the key that was parsed (used for multi-line headers)
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*/
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size_t ParseHeaderField(const char * a_Data, size_t a_IdxEnd, AString & a_Key);
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/** Parses one header field that is known to be a continuation of previous header.
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Returns the index to the next line, or npos if invalid request.
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*/
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size_t ParseHeaderFieldContinuation(const char * a_Data, size_t a_IdxEnd, AString & a_Key);
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} ;
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class cHTTPResponse :
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public cHTTPMessage
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{
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typedef cHTTPMessage super;
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public:
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cHTTPResponse(void);
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/** Appends the response to the specified datastream - response line and headers.
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The body will be sent later directly through cConnection::Send()
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*/
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void AppendToData(AString & a_DataStream) const;
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} ;
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@@ -0,0 +1,267 @@
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// HTTPServer.cpp
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// Implements the cHTTPServer class representing a HTTP webserver that uses cListenThread and cSocketThreads for processing
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#include "Globals.h"
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#include "HTTPServer.h"
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#include "HTTPMessage.h"
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// Disable MSVC warnings:
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#if defined(_MSC_VER)
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#pragma warning(push)
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#pragma warning(disable:4355) // 'this' : used in base member initializer list
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#endif
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// cHTTPConnection:
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cHTTPConnection::cHTTPConnection(cHTTPServer & a_HTTPServer) :
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m_HTTPServer(a_HTTPServer),
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m_State(wcsRecvHeaders),
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m_CurrentRequest(NULL)
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{
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}
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void cHTTPConnection::SendStatusAndReason(int a_StatusCode, const AString & a_Response)
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{
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AppendPrintf(m_OutgoingData, "%d %s\r\n\r\n", a_StatusCode, a_Response.c_str());
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}
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void cHTTPConnection::Send(const cHTTPResponse & a_Response)
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{
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ASSERT(m_State = wcsRecvIdle);
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a_Response.AppendToData(m_OutgoingData);
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m_State = wcsSendingResp;
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}
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void cHTTPConnection::Send(const void * a_Data, int a_Size)
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{
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ASSERT(m_State == wcsSendingResp);
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AppendPrintf(m_OutgoingData, "%x\r\n", a_Size);
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m_OutgoingData.append((const char *)a_Data, a_Size);
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}
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void cHTTPConnection::FinishResponse(void)
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{
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ASSERT(m_State == wcsSendingResp);
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m_OutgoingData.append("0\r\n");
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m_State = wcsRecvHeaders;
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}
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void cHTTPConnection::DataReceived(const char * a_Data, int a_Size)
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{
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switch (m_State)
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{
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case wcsRecvHeaders:
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{
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ASSERT(m_CurrentRequest == NULL);
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// Start searching 3 chars from the end of the already received data, if available:
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size_t SearchStart = m_IncomingHeaderData.size();
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SearchStart = (SearchStart > 3) ? SearchStart - 3 : 0;
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m_IncomingHeaderData.append(a_Data, a_Size);
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// Parse the header, if it is complete:
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size_t idxEnd = m_IncomingHeaderData.find("\r\n\r\n", SearchStart);
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if (idxEnd == AString::npos)
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{
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return;
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}
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m_CurrentRequest = new cHTTPRequest;
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if (!m_CurrentRequest->ParseHeaders(m_IncomingHeaderData.c_str(), idxEnd + 2))
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{
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delete m_CurrentRequest;
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m_CurrentRequest = NULL;
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m_State = wcsInvalid;
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m_HTTPServer.CloseConnection(*this);
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return;
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}
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m_State = wcsRecvBody;
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m_HTTPServer.NewRequest(*this, *m_CurrentRequest);
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// Process the rest of the incoming data into the request body:
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if (m_IncomingHeaderData.size() > idxEnd + 4)
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{
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m_IncomingHeaderData.erase(0, idxEnd + 4);
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DataReceived(m_IncomingHeaderData.c_str(), m_IncomingHeaderData.size());
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}
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break;
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}
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case wcsRecvBody:
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{
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ASSERT(m_CurrentRequest != NULL);
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// TODO: Receive the body, and the next request (If HTTP/1.1 keepalive)
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break;
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}
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default:
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{
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// TODO: Should we be receiving data in this state?
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break;
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}
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}
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}
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||||
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void cHTTPConnection::GetOutgoingData(AString & a_Data)
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{
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std::swap(a_Data, m_OutgoingData);
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}
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||||
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||||
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||||
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void cHTTPConnection::SocketClosed(void)
|
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{
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if (m_CurrentRequest != NULL)
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{
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m_HTTPServer.RequestFinished(*this, *m_CurrentRequest);
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||||
}
|
||||
}
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||||
|
||||
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||||
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||||
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||||
|
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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||||
// cHTTPServer:
|
||||
|
||||
cHTTPServer::cHTTPServer(void) :
|
||||
m_ListenThreadIPv4(*this, cSocket::IPv4, "WebServer IPv4"),
|
||||
m_ListenThreadIPv6(*this, cSocket::IPv6, "WebServer IPv6"),
|
||||
m_SocketThreads()
|
||||
{
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
bool cHTTPServer::Initialize(cIniFile & a_IniFile)
|
||||
{
|
||||
if (!a_IniFile.GetValueSetB("WebAdmin", "Enabled", false))
|
||||
{
|
||||
// The WebAdmin is disabled
|
||||
return true;
|
||||
}
|
||||
bool HasAnyPort;
|
||||
HasAnyPort = m_ListenThreadIPv4.Initialize(a_IniFile.GetValueSet("WebAdmin", "Port", "8081"));
|
||||
HasAnyPort = m_ListenThreadIPv6.Initialize(a_IniFile.GetValueSet("WebAdmin", "PortsIPv6", "8082, 3300")) || HasAnyPort;
|
||||
if (!HasAnyPort)
|
||||
{
|
||||
LOG("WebAdmin is disabled");
|
||||
return false;
|
||||
}
|
||||
if (!m_ListenThreadIPv4.Start())
|
||||
{
|
||||
return false;
|
||||
}
|
||||
if (!m_ListenThreadIPv6.Start())
|
||||
{
|
||||
m_ListenThreadIPv4.Stop();
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
void cHTTPServer::OnConnectionAccepted(cSocket & a_Socket)
|
||||
{
|
||||
cHTTPConnection * Connection = new cHTTPConnection(*this);
|
||||
m_SocketThreads.AddClient(a_Socket, Connection);
|
||||
cCSLock Lock(m_CSConnections);
|
||||
m_Connections.push_back(Connection);
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
void cHTTPServer::CloseConnection(cHTTPConnection & a_Connection)
|
||||
{
|
||||
m_SocketThreads.RemoveClient(&a_Connection);
|
||||
cCSLock Lock(m_CSConnections);
|
||||
for (cHTTPConnections::iterator itr = m_Connections.begin(), end = m_Connections.end(); itr != end; ++itr)
|
||||
{
|
||||
if (*itr == &a_Connection)
|
||||
{
|
||||
m_Connections.erase(itr);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
void cHTTPServer::NewRequest(cHTTPConnection & a_Connection, cHTTPRequest & a_Request)
|
||||
{
|
||||
// TODO
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
void cHTTPServer::RequestBody(cHTTPConnection & a_Connection, cHTTPRequest & a_Request)
|
||||
{
|
||||
// TODO
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
void cHTTPServer::RequestFinished(cHTTPConnection & a_Connection, cHTTPRequest & a_Request)
|
||||
{
|
||||
// TODO
|
||||
|
||||
// DEBUG: Send a debug response:
|
||||
cHTTPResponse Resp;
|
||||
Resp.SetContentType("text/plain");
|
||||
a_Connection.Send(Resp);
|
||||
a_Connection.Send("Hello");
|
||||
a_Connection.FinishResponse();
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
@@ -0,0 +1,135 @@
|
||||
|
||||
// HTTPServer.h
|
||||
|
||||
// Declares the cHTTPServer class representing a HTTP webserver that uses cListenThread and cSocketThreads for processing
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
#pragma once
|
||||
|
||||
#include "../OSSupport/ListenThread.h"
|
||||
#include "../OSSupport/SocketThreads.h"
|
||||
#include "../../iniFile/iniFile.h"
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
// fwd:
|
||||
class cHTTPServer;
|
||||
class cHTTPMessage;
|
||||
class cHTTPRequest;
|
||||
class cHTTPResponse;
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
class cHTTPConnection :
|
||||
public cSocketThreads::cCallback
|
||||
{
|
||||
public:
|
||||
|
||||
enum eState
|
||||
{
|
||||
wcsRecvHeaders, ///< Receiving request headers (m_CurrentRequest == NULL)
|
||||
wcsRecvBody, ///< Receiving request body (m_CurrentRequest is valid)
|
||||
wcsRecvIdle, ///< Has received the entire body, waiting to send the response (m_CurrentRequest == NULL)
|
||||
wcsSendingResp, ///< Sending response body (m_CurrentRequest == NULL)
|
||||
wcsInvalid, ///< The request was malformed, the connection is closing
|
||||
} ;
|
||||
|
||||
cHTTPConnection(cHTTPServer & a_HTTPServer);
|
||||
|
||||
/// Sends HTTP status code together with a_Reason (used for HTTP errors)
|
||||
void SendStatusAndReason(int a_StatusCode, const AString & a_Reason);
|
||||
|
||||
/// Sends the headers contained in a_Response
|
||||
void Send(const cHTTPResponse & a_Response);
|
||||
|
||||
/// Sends the data as the response (may be called multiple times)
|
||||
void Send(const void * a_Data, int a_Size);
|
||||
|
||||
/// Sends the data as the response (may be called multiple times)
|
||||
void Send(const AString & a_Data) { Send(a_Data.data(), a_Data.size()); }
|
||||
|
||||
/// Finishes sending current response, gets ready for receiving another request (HTTP 1.1 keepalive)
|
||||
void FinishResponse(void);
|
||||
|
||||
protected:
|
||||
typedef std::map<AString, AString> cNameValueMap;
|
||||
|
||||
/// The parent webserver that is to be notified of events on this connection
|
||||
cHTTPServer & m_HTTPServer;
|
||||
|
||||
/// All the incoming data until the entire request header is parsed
|
||||
AString m_IncomingHeaderData;
|
||||
|
||||
/// Status in which the request currently is
|
||||
eState m_State;
|
||||
|
||||
/// Data that is queued for sending, once the socket becomes writable
|
||||
AString m_OutgoingData;
|
||||
|
||||
/// The request being currently received (valid only between having parsed the headers and finishing receiving the body)
|
||||
cHTTPRequest * m_CurrentRequest;
|
||||
|
||||
|
||||
/// Parses the header in m_IncomingData until the specified end mark
|
||||
void ParseHeader(size_t a_IdxEnd);
|
||||
|
||||
/// Sends the response status and headers. Transition from wrsRecvBody to wrsSendingResp.
|
||||
void SendRespHeaders(void);
|
||||
|
||||
// cSocketThreads::cCallback overrides:
|
||||
virtual void DataReceived (const char * a_Data, int a_Size) override; // Data is received from the client
|
||||
virtual void GetOutgoingData(AString & a_Data) override; // Data can be sent to client
|
||||
virtual void SocketClosed (void) override; // The socket has been closed for any reason
|
||||
} ;
|
||||
|
||||
typedef std::vector<cHTTPConnection *> cHTTPConnections;
|
||||
|
||||
|
||||
|
||||
|
||||
class cHTTPServer :
|
||||
public cListenThread::cCallback
|
||||
{
|
||||
public:
|
||||
cHTTPServer(void);
|
||||
|
||||
bool Initialize(cIniFile & a_IniFile);
|
||||
|
||||
protected:
|
||||
friend class cHTTPConnection;
|
||||
|
||||
cListenThread m_ListenThreadIPv4;
|
||||
cListenThread m_ListenThreadIPv6;
|
||||
|
||||
cSocketThreads m_SocketThreads;
|
||||
|
||||
cCriticalSection m_CSConnections;
|
||||
cHTTPConnections m_Connections; ///< All the connections that are currently being serviced
|
||||
|
||||
// cListenThread::cCallback overrides:
|
||||
virtual void OnConnectionAccepted(cSocket & a_Socket) override;
|
||||
|
||||
/// Called by cHTTPConnection to close the connection (presumably due to an error)
|
||||
void CloseConnection(cHTTPConnection & a_Connection);
|
||||
|
||||
/// Called by cHTTPConnection when it finishes parsing the request header
|
||||
void NewRequest(cHTTPConnection & a_Connection, cHTTPRequest & a_Request);
|
||||
|
||||
/// Called by cHTTPConenction when it receives more data for the request body
|
||||
void RequestBody(cHTTPConnection & a_Connection, cHTTPRequest & a_Request);
|
||||
|
||||
/// Called by cHTTPConnection when it detects that the request has finished (all of its body has been received)
|
||||
void RequestFinished(cHTTPConnection & a_Connection, cHTTPRequest & a_Request);
|
||||
} ;
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user