Mihail Stoyanov / HTTPServer

My fork of the HTTPServer (working)

Dependents:   DGWWebServer LAN2

HTTPServer/HTTPRPC.h@0:7a64fbb4069d, 2012-08-06 (annotated)

Committer:
screamer
Date:
Mon Aug 06 09:23:14 2012 +0000
Revision:
0:7a64fbb4069d
[mbed] converted /DGWWebServer/HTTPServer

Who changed what in which revision?

UserRevisionLine numberNew contents of line
screamer 0:7a64fbb4069d 1 #ifndef HTTPRPC_H
screamer 0:7a64fbb4069d 2 #define HTTPRPC_H
screamer 0:7a64fbb4069d 3
screamer 0:7a64fbb4069d 4 #include "HTTPServer.h"
screamer 0:7a64fbb4069d 5 #include "platform.h"
screamer 0:7a64fbb4069d 6 #ifdef MBED_RPC
screamer 0:7a64fbb4069d 7 #include "rpc.h"
screamer 0:7a64fbb4069d 8
screamer 0:7a64fbb4069d 9 /**
screamer 0:7a64fbb4069d 10 * A datastorage helper for the HTTPRPC class
screamer 0:7a64fbb4069d 11 */
screamer 0:7a64fbb4069d 12 class HTTPRPCData : public HTTPData {
screamer 0:7a64fbb4069d 13 public: char result[255];
screamer 0:7a64fbb4069d 14 };
screamer 0:7a64fbb4069d 15
screamer 0:7a64fbb4069d 16 /**
screamer 0:7a64fbb4069d 17 * Thsi class enables you to make rpc calls to your mbed.
screamer 0:7a64fbb4069d 18 * Furthermore it is a good example how to write a HTTPHandler for small data chunks.
screamer 0:7a64fbb4069d 19 */
screamer 0:7a64fbb4069d 20 class HTTPRPC : public HTTPHandler {
screamer 0:7a64fbb4069d 21 public:
screamer 0:7a64fbb4069d 22 /**
screamer 0:7a64fbb4069d 23 * We have to know the prefix for the RPCHandler.
screamer 0:7a64fbb4069d 24 * A good default choice is /rpc so we made this default.
screamer 0:7a64fbb4069d 25 */
screamer 0:7a64fbb4069d 26 HTTPRPC(const char *path = "/rpc") : HTTPHandler(path) {}
screamer 0:7a64fbb4069d 27
screamer 0:7a64fbb4069d 28 private:
screamer 0:7a64fbb4069d 29 /**
screamer 0:7a64fbb4069d 30 * If you need some Headerfeelds you have tor register the feelds here.
screamer 0:7a64fbb4069d 31 */
screamer 0:7a64fbb4069d 32 // virtual void reg(HTTPServer *svr) {
screamer 0:7a64fbb4069d 33 // svr->registerField("Content-Length");
screamer 0:7a64fbb4069d 34 // }
screamer 0:7a64fbb4069d 35
screamer 0:7a64fbb4069d 36 /**
screamer 0:7a64fbb4069d 37 * If a new RPCRequest Header is complete received the server will call this function.
screamer 0:7a64fbb4069d 38 * This is the right place for preparing our datastructures.
screamer 0:7a64fbb4069d 39 * Furthermore we will execute the rpc call and store the anwere.
screamer 0:7a64fbb4069d 40 * But we will not send a response. This will be hapen in the send method.
screamer 0:7a64fbb4069d 41 */
screamer 0:7a64fbb4069d 42 virtual HTTPStatus init(HTTPConnection *con) const {
screamer 0:7a64fbb4069d 43 HTTPRPCData *data = new HTTPRPCData();
screamer 0:7a64fbb4069d 44 con->data = data;
screamer 0:7a64fbb4069d 45 char *query = con->getURL()+strlen(_prefix);
screamer 0:7a64fbb4069d 46 clean(query);
screamer 0:7a64fbb4069d 47 rpc(query, data->result);
screamer 0:7a64fbb4069d 48
screamer 0:7a64fbb4069d 49 const char *nfields = "Cache-Control: no-cache, no-store, must-revalidate\r\nPragma: no-cache\r\nExpires: Thu, 01 Dec 1994 16:00:00 GM";
screamer 0:7a64fbb4069d 50 char *old = (char *)con->getHeaderFields();
screamer 0:7a64fbb4069d 51 int oldlen = strlen(old);
screamer 0:7a64fbb4069d 52 int atrlen = strlen(nfields);
screamer 0:7a64fbb4069d 53 char *fields = new char[atrlen+oldlen+3];
screamer 0:7a64fbb4069d 54 strcpy(fields,old);
screamer 0:7a64fbb4069d 55 fields[oldlen+0] = '\r';
screamer 0:7a64fbb4069d 56 fields[oldlen+1] = '\n';
screamer 0:7a64fbb4069d 57 strcpy(&fields[oldlen+2], nfields);
screamer 0:7a64fbb4069d 58 fields[atrlen+2+oldlen] = '\0';
screamer 0:7a64fbb4069d 59 con->setHeaderFields(fields);
screamer 0:7a64fbb4069d 60 if(*old) {
screamer 0:7a64fbb4069d 61 delete old;
screamer 0:7a64fbb4069d 62 }
screamer 0:7a64fbb4069d 63
screamer 0:7a64fbb4069d 64 con->setLength(strlen(data->result));
screamer 0:7a64fbb4069d 65 return HTTP_OK;
screamer 0:7a64fbb4069d 66 }
screamer 0:7a64fbb4069d 67
screamer 0:7a64fbb4069d 68 /**
screamer 0:7a64fbb4069d 69 * If we got an POST request the send method will not be executed.
screamer 0:7a64fbb4069d 70 * If we want to send data we have to trigger it the first time by ourself.
screamer 0:7a64fbb4069d 71 * So we execute the send method.
screamer 0:7a64fbb4069d 72 *
screamer 0:7a64fbb4069d 73 * If the rpc call is the content of the POST body we would not be able to execute it.
screamer 0:7a64fbb4069d 74 * Were parsing only the URL.
screamer 0:7a64fbb4069d 75 */
screamer 0:7a64fbb4069d 76 virtual HTTPHandle data(HTTPConnection *con, void *, int) const {
screamer 0:7a64fbb4069d 77 return send(con, con->sndbuf());
screamer 0:7a64fbb4069d 78 }
screamer 0:7a64fbb4069d 79
screamer 0:7a64fbb4069d 80 /**
screamer 0:7a64fbb4069d 81 * Send the result back to the client.
screamer 0:7a64fbb4069d 82 * If we have not enought space wait for next time.
screamer 0:7a64fbb4069d 83 */
screamer 0:7a64fbb4069d 84 virtual HTTPHandle send(HTTPConnection *con, int maximum) const {
screamer 0:7a64fbb4069d 85 HTTPRPCData *data = static_cast<HTTPRPCData *>(con->data);
screamer 0:7a64fbb4069d 86 if(maximum>64) {
screamer 0:7a64fbb4069d 87 con->write(data->result, con->getLength());
screamer 0:7a64fbb4069d 88 return HTTP_SuccessEnded;
screamer 0:7a64fbb4069d 89 } else {
screamer 0:7a64fbb4069d 90 // To less memory.
screamer 0:7a64fbb4069d 91 return HTTP_SenderMemory;
screamer 0:7a64fbb4069d 92 }
screamer 0:7a64fbb4069d 93 }
screamer 0:7a64fbb4069d 94
screamer 0:7a64fbb4069d 95 /**
screamer 0:7a64fbb4069d 96 * To reduce memory usage we sodify the URL directly
screamer 0:7a64fbb4069d 97 * and replace '%20',',','+','=' with spaces.
screamer 0:7a64fbb4069d 98 */
screamer 0:7a64fbb4069d 99 inline void clean(char *str) const {
screamer 0:7a64fbb4069d 100 while(*str++) {
screamer 0:7a64fbb4069d 101 if(*str=='%'&&*(str+1)=='2'&&*(str+2)=='0') {
screamer 0:7a64fbb4069d 102 *str = ' ';
screamer 0:7a64fbb4069d 103 *(str+1) = ' ';
screamer 0:7a64fbb4069d 104 *(str+2) = ' ';
screamer 0:7a64fbb4069d 105 }
screamer 0:7a64fbb4069d 106 if(*str==','||*str=='+'||*str=='=') {
screamer 0:7a64fbb4069d 107 *str = ' ';
screamer 0:7a64fbb4069d 108 }
screamer 0:7a64fbb4069d 109 }
screamer 0:7a64fbb4069d 110 }
screamer 0:7a64fbb4069d 111 };
screamer 0:7a64fbb4069d 112 #endif
screamer 0:7a64fbb4069d 113
screamer 0:7a64fbb4069d 114 #endif