Andrew Boyson
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
Diff: http.cpp
- Revision:
- 2:849103b5a16d
- Parent:
- 1:5f70c361db20
- Child:
- 3:ab6fd66d172c
--- a/http.cpp Thu Jan 19 23:03:26 2017 +0000
+++ b/http.cpp Fri Jan 27 19:58:51 2017 +0000
@@ -1,25 +1,293 @@
-#include "mbed.h"
+#include "mbed.h"
+#include "favicon.h"
+#include "css.h"
+#include "arp.h"
+#include "time.h"
+
+#define DO_NOT_FOUND 0
+#define DO_CSS 1
+#define DO_FAVICON 2
+#define DO_HTML 3
+
+#define HTTP_DATE_LENGTH 30
+
+static char* addNavItem(char* pText, int highlight, char* href, char* title)
+{
+ char *p;
+ p = "<li "; while (*p) *pText++ = *p++;
+ if (highlight) p = "class='this'";
+ else p = " ";
+ while (*p) *pText++ = *p++;
+ p = "><a href='"; while (*p) *pText++ = *p++;
+ p = href; while (*p) *pText++ = *p++;
+ p = "'>"; while (*p) *pText++ = *p++;
+ p = title; while (*p) *pText++ = *p++;
+ p = "</a></li>\r\n"; while (*p) *pText++ = *p++;
+
+ return pText;
+}
+enum pages
+{
+ HOME_PAGE,
+ PROGRAM_PAGE,
+ HEATING_PAGE,
+ BOILER_PAGE,
+ SYSTEM_PAGE,
+ LOG_PAGE
+};
+static void addNav(char* pText, int page)
+{
+ char* p;
+ p = "<nav><ul>\r\n"; while (*p) *pText++ = *p++;
+ pText = addNavItem(pText, page == HOME_PAGE, "/", "Home");
+ pText = addNavItem(pText, page == PROGRAM_PAGE, "/program", "Program");
+ pText = addNavItem(pText, page == HEATING_PAGE, "/heating", "Heating");
+ pText = addNavItem(pText, page == BOILER_PAGE, "/boiler", "Boiler");
+ pText = addNavItem(pText, page == SYSTEM_PAGE, "/system", "System");
+ pText = addNavItem(pText, page == LOG_PAGE, "/log", "Log");
+ p = "</ul></nav>\r\n"; while (*p) *pText++ = *p++;
+ *pText = 0;
+}
+
+
+static void dateHeaderFromTm(struct tm* ptm, char* ptext)
+{
+ 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
+}
+static void dateHeaderFromNow(char* pText)
+{
+ struct tm tm;
+ TimeToTmUtc(time(NULL), &tm);
+ dateHeaderFromTm(&tm, pText);
+}
+static void dateHeaderFromDateTime(const char* date, const char *ptime, char* ptext)
+{
+ struct tm tm;
+ TimeAsciiDateTimeToTm(date, ptime, &tm);
+ dateHeaderFromTm(&tm, ptext);
+}
+
+
-void HttpRequest(int position, int len, char *pData)
+static void splitRequest(char* p, char** ppMethod, char** ppPath, char** ppQuery)
+{
+ *ppMethod = NULL;
+ *ppPath = NULL;
+ *ppQuery = NULL;
+
+ while (*p == ' ') //Move past any leading spaces
+ {
+ if (*p == 0) return;
+ p++;
+ }
+ *ppMethod = p; //Record the start of the method (GET or POST)
+
+ while (*p != ' ') //Move past the method
+ {
+ if (*p == 0) return;
+ p++;
+ }
+ *p = 0; //Terminate the method
+ p++; //Start at next character
+
+ while (*p == ' ') //Move past any spaces
+ {
+ if (*p == 0) return;
+ p++;
+ }
+ *ppPath = p; //Record the start of the path
+
+ while (*p != ' ') //Move past the path and query
+ {
+ if (*p == 0) return;
+ if (*p == '?')
+ {
+ *p = 0; //Terminate the path
+ *ppQuery = p + 1; //Record the start of the query
+ }
+ p++;
+ }
+ *p = 0; //Terminate the path or query
+}
+
+int HttpRequest(int position, int len, char *pData)
+{
+ char* pMethod;
+ char* pPath;
+ char* pQuery;
+
+ splitRequest(pData, &pMethod, &pPath, &pQuery);
+
+ int todo = DO_NOT_FOUND;
+ if (strcmp(pPath, "/" ) == 0) todo = DO_HTML;
+ if (strcmp(pPath, "/favicon.ico") == 0) todo = DO_FAVICON;
+ if (strcmp(pPath, "/gps.css" ) == 0) todo = DO_CSS;
+
+ return todo;
+}
+int sendNotFound(int position, int mss, char* pData)
{
+ printf("Sending 404 Not Found\r\n");
+ char *pHttp = "HTTP/1.1 404 Not Found\r\n"
+ "\r\n";
+ int lenHttp = strlen(pHttp);
+ char* p = pData;
+ for (int i = position; i < position + mss; i++)
+ {
+ if (i < lenHttp ) *p++ = pHttp[i];
+ else break;
+ }
+ return p - pData;
}
-int HttpResponse(int position, char *pData)
+int sendHtml(int position, int mss, char* pData)
{
- char *pHtml = "HTTP/1.1 200 OK\r\n"
- "Content-Type: text/html; charset=UTF-8\r\n"
- "Connection: close\r\n"
- "\r\n"
- "<html>\r\n"
- "<head>\r\n"
- " <title>GPS Clock</title>\r\n"
- "</head>\r\n"
- "<body>\r\n"
- " Hello World, this is the GPS Clock.\r\n"
- "</body>\r\n"
- "</html>\r\n";
- int len = strlen(pHtml) - position;
- if (len <= 0) return 0;
- strcpy(pData, pHtml);
- return strlen(pHtml);
+ const char *pA = "HTTP/1.1 200 OK\r\n"
+ "Content-Type: text/html; charset=UTF-8\r\n"
+ "Connection: close\r\n"
+ "Cache-control: no-cache\r\n"
+ "Date: ";
+
+ char pB[HTTP_DATE_LENGTH];
+ dateHeaderFromNow(pB);
+
+ const char* pC = "\r\n"
+ "\r\n"
+ "<html>\r\n"
+ "<head>\r\n"
+ " <meta name='viewport' content='width=device-width, initial-scale=1'>\r\n"
+ " <link rel='icon' href='/favicon.ico' type='image/x-icon'/>\r\n"
+ " <link rel='stylesheet' href='/gps.css' type='text/css' />\r\n"
+ " <title>GPS Clock</title>\r\n"
+ "</head>\r\n"
+ "<body>\r\n";
+
+ char pD[400];
+ addNav(pD, HOME_PAGE);
+
+ const char* pE = "\r\n"
+ "<h1>GPS Clock</h1>\r\n"
+ "<h2>ARP</h2>\r\n"
+ "<code>";
+
+ char pF[400];
+ ArpAsString(400, pF);
+
+ const char* pG = "</code>\r\n"
+ "</body>\r\n"
+ "</html>\r\n";
+
+ int lA = strlen(pA);
+ int lB = lA + HTTP_DATE_LENGTH;
+ int lC = lB + strlen(pC);
+ int lD = lC + strlen(pD);
+ int lE = lD + strlen(pE);
+ int lF = lE + strlen(pF);
+ int lG = lF + strlen(pG);
+
+ char* p = pData;
+ for (int i = position; i < position + mss; i++)
+ {
+ if (i < lA) *p++ = pA[i];
+ else if (i < lB) *p++ = pB[i - lA];
+ else if (i < lC) *p++ = pC[i - lB];
+ else if (i < lD) *p++ = pD[i - lC];
+ else if (i < lE) *p++ = pE[i - lD];
+ else if (i < lF) *p++ = pF[i - lE];
+ else if (i < lG) *p++ = pG[i - lF];
+ else break;
+ }
+ return p - pData;
+}
+int sendCss(int position, int mss, char* pData)
+{
+ const char *pA = "HTTP/1.1 200 OK\r\n"
+ "Content-Type: text/css; charset=UTF-8\r\n"
+ "Connection: close\r\n"
+ "Cache-Control: max-age=3600\r\n"
+ "Date: ";
+
+ char pB[HTTP_DATE_LENGTH];
+ dateHeaderFromNow(pB);
+
+ const char *pC = "\r\n"
+ "Last-Modified: ";
+
+ char pD[HTTP_DATE_LENGTH];
+ dateHeaderFromDateTime(CssDate, CssTime, pD);
+ const char *pE = "\r\n\r\n";
+
+ const char *pF = Css;
+
+ int lA = strlen(pA);
+ int lB = lA + HTTP_DATE_LENGTH;
+ int lC = lB + strlen(pC);
+ int lD = lC + HTTP_DATE_LENGTH;
+ int lE = lD + strlen(pE);
+ int lF = lE + strlen(pF);
+
+ char* p = pData;
+ for (int i = position; i < position + mss; i++)
+ {
+ if (i < lA) *p++ = pA[i];
+ else if (i < lB) *p++ = pB[i - lA];
+ else if (i < lC) *p++ = pC[i - lB];
+ else if (i < lD) *p++ = pD[i - lC];
+ else if (i < lE) *p++ = pE[i - lD];
+ else if (i < lF) *p++ = pF[i - lE];
+ else break;
+ }
+ return p - pData;
}
+int sendFavicon(int position, int mss, char* pData)
+{
+ const char* pA = "HTTP/1.1 200 OK\r\n"
+ "Content-Type: image/x-icon\r\n"
+ "Connection: close\r\n"
+ "Cache-Control: max-age=3600\r\n"
+ "Date: ";
+
+ char pB[HTTP_DATE_LENGTH];
+ dateHeaderFromNow(pB);
+
+ const char *pC = "\r\n"
+ "Last-Modified: ";
+
+ char pD[HTTP_DATE_LENGTH];
+ dateHeaderFromDateTime(FaviconDate, FaviconTime, pD);
+
+ const char *pE = "\r\n\r\n";
+
+ const char *pF = Favicon;
+
+ int lA = strlen(pA);
+ int lB = lA + HTTP_DATE_LENGTH;
+ int lC = lB + strlen(pC);
+ int lD = lC + HTTP_DATE_LENGTH;
+ int lE = lD + strlen(pE);
+ int lF = lE + FaviconSize;
+
+ char* p = pData;
+ for (int i = position; i < position + mss; i++)
+ {
+ if (i < lA) *p++ = pA[i];
+ else if (i < lB) *p++ = pB[i - lA];
+ else if (i < lC) *p++ = pC[i - lB];
+ else if (i < lD) *p++ = pD[i - lC];
+ else if (i < lE) *p++ = pE[i - lD];
+ else if (i < lF) *p++ = pF[i - lE];
+ else break;
+ }
+ return p - pData;
+}
+int HttpResponse(int position, int mss, char *pData, int todo)
+{
+ switch (todo)
+ {
+ case DO_NOT_FOUND: return sendNotFound(position, mss, pData);
+ case DO_HTML: return sendHtml (position, mss, pData);
+ case DO_CSS: return sendCss (position, mss, pData);
+ case DO_FAVICON: return sendFavicon (position, mss, pData);
+ }
+ return 0;
+}