Andrew Boyson / net

A stack which works with or without an Mbed os library. Provides IPv4 or IPv6 with a full 1500 byte buffer.

Dependents:   oldheating gps motorhome heating

http.cpp@4:31fa7d50722c, 2017-02-01 (annotated)

Committer:
andrewboyson
Date:
Wed Feb 01 07:41:03 2017 +0000
Revision:
4:31fa7d50722c
Parent:
3:ab6fd66d172c 
Added log library and removed printfs to the PC uart

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 2:849103b5a16d 1 #include "mbed.h"
andrewboyson 3:ab6fd66d172c 2 #include "http.h"
andrewboyson 2:849103b5a16d 3 #include "time.h"
andrewboyson 4:31fa7d50722c 4
andrewboyson 4:31fa7d50722c 5
andrewboyson 4:31fa7d50722c 6 int (*HttpRequestFunction)(char *pPath, char *pLastModified); //Plumb into this from your html server
andrewboyson 4:31fa7d50722c 7 int (*HttpResponseFunction)(int position, int mss, char *pData, int todo); //Plumb into this from your html server
andrewboyson 2:849103b5a16d 8
andrewboyson 2:849103b5a16d 9 static void dateHeaderFromTm(struct tm* ptm, char* ptext)
andrewboyson 2:849103b5a16d 10 {
andrewboyson 2:849103b5a16d 11 size_t size = strftime(ptext, HTTP_DATE_LENGTH, "%a, %d %b %Y %H:%M:%S GMT", ptm);//Sun, 06 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123
andrewboyson 2:849103b5a16d 12 }
andrewboyson 3:ab6fd66d172c 13 void HttpDateHeaderFromNow(char* pText)
andrewboyson 2:849103b5a16d 14 {
andrewboyson 2:849103b5a16d 15 struct tm tm;
andrewboyson 2:849103b5a16d 16 TimeToTmUtc(time(NULL), &tm);
andrewboyson 2:849103b5a16d 17 dateHeaderFromTm(&tm, pText);
andrewboyson 2:849103b5a16d 18 }
andrewboyson 3:ab6fd66d172c 19 void HttpDateHeaderFromDateTime(const char* date, const char *ptime, char* ptext)
andrewboyson 2:849103b5a16d 20 {
andrewboyson 2:849103b5a16d 21 struct tm tm;
andrewboyson 2:849103b5a16d 22 TimeAsciiDateTimeToTm(date, ptime, &tm);
andrewboyson 2:849103b5a16d 23 dateHeaderFromTm(&tm, ptext);
andrewboyson 2:849103b5a16d 24 }
andrewboyson 2:849103b5a16d 25
andrewboyson 3:ab6fd66d172c 26 static char* getNextLine(char* p, char* pE) //Terminates this line and returns the start of the next line or NULL if none
andrewboyson 3:ab6fd66d172c 27 {
andrewboyson 3:ab6fd66d172c 28 while (true)
andrewboyson 3:ab6fd66d172c 29 {
andrewboyson 3:ab6fd66d172c 30 if (p == pE) //There are no more lines
andrewboyson 3:ab6fd66d172c 31 {
andrewboyson 3:ab6fd66d172c 32 *p = 0; //terminate the line
andrewboyson 3:ab6fd66d172c 33 return NULL;
andrewboyson 3:ab6fd66d172c 34 }
andrewboyson 3:ab6fd66d172c 35 if (*p == 0) return NULL;//There are no more lines
andrewboyson 3:ab6fd66d172c 36 if (*p == '\n')
andrewboyson 3:ab6fd66d172c 37 {
andrewboyson 3:ab6fd66d172c 38 *p = 0; //make the line a c string
andrewboyson 3:ab6fd66d172c 39 return p + 1; //return the start of the next line
andrewboyson 3:ab6fd66d172c 40 }
andrewboyson 3:ab6fd66d172c 41 if (*p < ' ') *p = 0; //terminate the line at any invalid characters
andrewboyson 3:ab6fd66d172c 42 if (*p >= 0x7f) *p = 0; //terminate the line at any invalid characters
andrewboyson 3:ab6fd66d172c 43 p++;
andrewboyson 3:ab6fd66d172c 44 }
andrewboyson 3:ab6fd66d172c 45 }
andrewboyson 1:5f70c361db20 46
andrewboyson 2:849103b5a16d 47 static void splitRequest(char* p, char** ppMethod, char** ppPath, char** ppQuery)
andrewboyson 2:849103b5a16d 48 {
andrewboyson 2:849103b5a16d 49 *ppMethod = NULL;
andrewboyson 2:849103b5a16d 50 *ppPath = NULL;
andrewboyson 2:849103b5a16d 51 *ppQuery = NULL;
andrewboyson 2:849103b5a16d 52
andrewboyson 2:849103b5a16d 53 while (*p == ' ') //Move past any leading spaces
andrewboyson 2:849103b5a16d 54 {
andrewboyson 2:849103b5a16d 55 if (*p == 0) return;
andrewboyson 2:849103b5a16d 56 p++;
andrewboyson 2:849103b5a16d 57 }
andrewboyson 2:849103b5a16d 58 *ppMethod = p; //Record the start of the method (GET or POST)
andrewboyson 2:849103b5a16d 59
andrewboyson 2:849103b5a16d 60 while (*p != ' ') //Move past the method
andrewboyson 2:849103b5a16d 61 {
andrewboyson 2:849103b5a16d 62 if (*p == 0) return;
andrewboyson 2:849103b5a16d 63 p++;
andrewboyson 2:849103b5a16d 64 }
andrewboyson 2:849103b5a16d 65 *p = 0; //Terminate the method
andrewboyson 2:849103b5a16d 66 p++; //Start at next character
andrewboyson 2:849103b5a16d 67
andrewboyson 2:849103b5a16d 68 while (*p == ' ') //Move past any spaces
andrewboyson 2:849103b5a16d 69 {
andrewboyson 2:849103b5a16d 70 if (*p == 0) return;
andrewboyson 2:849103b5a16d 71 p++;
andrewboyson 2:849103b5a16d 72 }
andrewboyson 2:849103b5a16d 73 *ppPath = p; //Record the start of the path
andrewboyson 2:849103b5a16d 74
andrewboyson 2:849103b5a16d 75 while (*p != ' ') //Move past the path and query
andrewboyson 2:849103b5a16d 76 {
andrewboyson 2:849103b5a16d 77 if (*p == 0) return;
andrewboyson 2:849103b5a16d 78 if (*p == '?')
andrewboyson 2:849103b5a16d 79 {
andrewboyson 2:849103b5a16d 80 *p = 0; //Terminate the path
andrewboyson 2:849103b5a16d 81 *ppQuery = p + 1; //Record the start of the query
andrewboyson 2:849103b5a16d 82 }
andrewboyson 2:849103b5a16d 83 p++;
andrewboyson 2:849103b5a16d 84 }
andrewboyson 2:849103b5a16d 85 *p = 0; //Terminate the path or query
andrewboyson 2:849103b5a16d 86 }
andrewboyson 3:ab6fd66d172c 87 static void splitHeader(char* p, char** ppName, char** ppValue)
andrewboyson 3:ab6fd66d172c 88 {
andrewboyson 3:ab6fd66d172c 89 *ppName = p; //Record the start of the name
andrewboyson 3:ab6fd66d172c 90 *ppValue = NULL;
andrewboyson 2:849103b5a16d 91
andrewboyson 3:ab6fd66d172c 92 while (*p != ':') //Loop to an ':'
andrewboyson 3:ab6fd66d172c 93 {
andrewboyson 3:ab6fd66d172c 94 if (!*p) return;
andrewboyson 3:ab6fd66d172c 95 p++;
andrewboyson 3:ab6fd66d172c 96 }
andrewboyson 3:ab6fd66d172c 97 *p = 0; //Terminate the name by replacing the ':' with a NUL char
andrewboyson 3:ab6fd66d172c 98 p++;
andrewboyson 3:ab6fd66d172c 99 while (*p == ' ') //Move past any spaces
andrewboyson 3:ab6fd66d172c 100 {
andrewboyson 3:ab6fd66d172c 101 if (*p == 0) return;
andrewboyson 3:ab6fd66d172c 102 p++;
andrewboyson 3:ab6fd66d172c 103 }
andrewboyson 3:ab6fd66d172c 104 *ppValue = p; //Record the start of the value
andrewboyson 3:ab6fd66d172c 105 }
andrewboyson 4:31fa7d50722c 106
andrewboyson 2:849103b5a16d 107 int HttpRequest(int position, int len, char *pData)
andrewboyson 3:ab6fd66d172c 108 {
andrewboyson 2:849103b5a16d 109 char* pMethod;
andrewboyson 2:849103b5a16d 110 char* pPath;
andrewboyson 2:849103b5a16d 111 char* pQuery;
andrewboyson 2:849103b5a16d 112
andrewboyson 3:ab6fd66d172c 113 char* pEnd = pData + len;
andrewboyson 3:ab6fd66d172c 114 char* pThis = pData;
andrewboyson 3:ab6fd66d172c 115 char* pNext = getNextLine(pThis, pEnd);
andrewboyson 3:ab6fd66d172c 116 splitRequest(pThis, &pMethod, &pPath, &pQuery);
andrewboyson 2:849103b5a16d 117
andrewboyson 3:ab6fd66d172c 118 char* pLastModified;
andrewboyson 3:ab6fd66d172c 119 while(pNext)
andrewboyson 2:849103b5a16d 120 {
andrewboyson 3:ab6fd66d172c 121 pThis = pNext;
andrewboyson 3:ab6fd66d172c 122 pNext = getNextLine(pThis, pEnd);
andrewboyson 3:ab6fd66d172c 123 if (*pThis == 0) break; //This line is empty ie no more headers
andrewboyson 3:ab6fd66d172c 124 char* pName;
andrewboyson 3:ab6fd66d172c 125 char* pValue;
andrewboyson 3:ab6fd66d172c 126 splitHeader(pThis, &pName, &pValue);
andrewboyson 3:ab6fd66d172c 127 if (strcmp(pName, "If-Modified-Since") == 0) pLastModified = pValue;
andrewboyson 2:849103b5a16d 128 }
andrewboyson 2:849103b5a16d 129
andrewboyson 4:31fa7d50722c 130 return HttpRequestFunction(pPath, pLastModified);
andrewboyson 2:849103b5a16d 131 }
andrewboyson 2:849103b5a16d 132 int HttpResponse(int position, int mss, char *pData, int todo)
andrewboyson 2:849103b5a16d 133 {
andrewboyson 4:31fa7d50722c 134 return HttpResponseFunction(position, mss, pData, todo);
andrewboyson 2:849103b5a16d 135 }
andrewboyson 3:ab6fd66d172c 136