HTTPRestHandler.cpp

00001 #include "HTTPRestHandler.h"
00002 #include "stdio.h"
00003 #include "TemperatureSensor.h"
00004 #include "RGBLed.h"
00005 
00006 extern TemperatureSensor sensor;
00007 extern RGBLed rgb;
00008 
00009 HTTPStatus HTTPRestHandler::doGet(char *resource, HTTPConnection *conn) const {
00010     printf("HTTPRestHandler GET: %s\n", resource);
00011 
00012     HTTPRestData *d= new HTTPRestData();
00013     char *host;
00014     char buffer[20];
00015 
00016     // The host field string can have junk at the end...
00017     host= (char*) conn->getField("Host");
00018     for (char *p= host; *p != 0; p++) {
00019         if(!isprint(*p)) {
00020             *p= 0;
00021         }
00022     }
00023 
00024     if (strcmp(resource, "/") == 0) {
00025         strcat(d->response, "{\"temperature\":\"http://");
00026         strcat(d->response, host);
00027         strcat(d->response, conn->getURL());
00028         strcat(d->response, "temperature\",\"rgbled\":\"http://");
00029         strcat(d->response, host);
00030         strcat(d->response, conn->getURL());
00031         strcat(d->response, "rgbled\"}");
00032     } else if (strcmp(resource, "/temperature") == 0) {
00033         sensor.measure();
00034         sprintf(buffer, "%f", sensor.getKelvin());
00035     
00036         strcat(d->response, "{\"realtime-uri\":\"ws://");
00037         strcat(d->response, host);
00038         strcat(d->response, "/ws/\",\"format\":\"text/csv\",\"fields\":\"ADC,resistence,temperature\",\"calibration\":\"http:/");
00039         strcat(d->response, conn->getURL());
00040         strcat(d->response, "/calibration\",");
00041         strcat(d->response, "\"units\":\"kelvin\",\"value\":");
00042         strcat(d->response, buffer);
00043         strcat(d->response, "}");
00044     } else if (strcmp(resource, "/temperature/calibration") == 0) {
00045         strcat(d->response, "{TODO}");
00046     } else if (strcmp(resource, "/rgbled") == 0) {
00047         strcat(d->response, "{\"web-socket-uri\":\"ws://");
00048         strcat(d->response, host);
00049         strcat(d->response, "/ws/\",\"format\":\"text/csv\",\"fields\":\"red,green,blue\"}");
00050     } else return HTTP_NotFound;
00051 
00052     //conn->setHeaderFields("Content-Type: application/json");
00053     conn->setLength(strlen(d->response));
00054     conn->data= d;
00055 
00056     //printf("json: [ %s ]\n", static_cast<HTTPRestData*>(conn->data)->response);
00057     return HTTP_OK;
00058 }
00059 
00060 HTTPStatus HTTPRestHandler::doPost(char *resource, HTTPConnection *conn) const {
00061     printf("HTTPRestHandler POST: %s\n",  resource);
00062     return HTTP_NotFound;
00063 }
00064 
00065 void HTTPRestHandler::reg(HTTPServer *server) {
00066     server->registerField("Host");
00067 }
00068 
00069 HTTPStatus HTTPRestHandler::init(HTTPConnection *conn) const {
00070     char *resource=  conn->getURL() + prefixLength;
00071     switch (conn->getType()) {
00072         case GET:
00073             return doGet(resource, conn);
00074 
00075         case POST:
00076             return doPost(resource, conn);
00077     }
00078     return HTTP_BadRequest;
00079 }
00080 
00081 
00082 HTTPHandle HTTPRestHandler::data(HTTPConnection *conn, void *data, int len) const {
00083     //printf("REST data()\n");
00084     return HTTP_SuccessEnded;
00085 }
00086 
00087 HTTPHandle HTTPRestHandler::send(HTTPConnection *conn, int maxData) const {
00088     HTTPRestData *d= static_cast<HTTPRestData*>(conn->data);
00089     const char *str= d->response;
00090     int len= strlen(str);
00091     printf("REST send: %d [ %s ]\n", len, str);
00092     conn->write((void*)str, len);
00093     return HTTP_SuccessEnded;
00094 }