Rod Coleman / lwip-mbed-2010

Port of LwIP performed by Ralf in 2010. Not recommended for use with recent mbed libraries, but good demos of raw LwIP possible

Dependents:   LwIP_raw_API_serverExample tiny-dtls

HTTPServer/HTTPRPC.h@0:0791c1fece8e, 2012-09-18 (annotated)

Committer:
RodColeman
Date:
Tue Sep 18 14:41:24 2012 +0000
Revision:
0:0791c1fece8e
[mbed] converted /Eth_TCP_Wei_Server/lwip

Who changed what in which revision?

UserRevisionLine numberNew contents of line
RodColeman 0:0791c1fece8e 1 #ifndef HTTPRPC_H
RodColeman 0:0791c1fece8e 2 #define HTTPRPC_H
RodColeman 0:0791c1fece8e 3
RodColeman 0:0791c1fece8e 4 #include "HTTPServer.h"
RodColeman 0:0791c1fece8e 5 #include "platform.h"
RodColeman 0:0791c1fece8e 6 #ifdef MBED_RPC
RodColeman 0:0791c1fece8e 7 #include "rpc.h"
RodColeman 0:0791c1fece8e 8
RodColeman 0:0791c1fece8e 9 /**
RodColeman 0:0791c1fece8e 10 * A datastorage helper for the HTTPRPC class
RodColeman 0:0791c1fece8e 11 */
RodColeman 0:0791c1fece8e 12 class HTTPRPCData : public HTTPData {
RodColeman 0:0791c1fece8e 13 public: char result[255];
RodColeman 0:0791c1fece8e 14 };
RodColeman 0:0791c1fece8e 15
RodColeman 0:0791c1fece8e 16 /**
RodColeman 0:0791c1fece8e 17 * Thsi class enables you to make rpc calls to your mbed.
RodColeman 0:0791c1fece8e 18 * Furthermore it is a good example how to write a HTTPHandler for small data chunks.
RodColeman 0:0791c1fece8e 19 */
RodColeman 0:0791c1fece8e 20 class HTTPRPC : public HTTPHandler {
RodColeman 0:0791c1fece8e 21 public:
RodColeman 0:0791c1fece8e 22 /**
RodColeman 0:0791c1fece8e 23 * We have to know the prefix for the RPCHandler.
RodColeman 0:0791c1fece8e 24 * A good default choice is /rpc so we made this default.
RodColeman 0:0791c1fece8e 25 */
RodColeman 0:0791c1fece8e 26 HTTPRPC(const char *path = "/rpc") : HTTPHandler(path) {}
RodColeman 0:0791c1fece8e 27 HTTPRPC(HTTPServer *server, const char *path = "/rpc") : HTTPHandler(path) { server->addHandler(this); }
RodColeman 0:0791c1fece8e 28
RodColeman 0:0791c1fece8e 29 private:
RodColeman 0:0791c1fece8e 30 /**
RodColeman 0:0791c1fece8e 31 * If you need some Headerfeelds you have tor register the feelds here.
RodColeman 0:0791c1fece8e 32 */
RodColeman 0:0791c1fece8e 33 // virtual void reg(HTTPServer *svr) {
RodColeman 0:0791c1fece8e 34 // svr->registerField("Content-Length");
RodColeman 0:0791c1fece8e 35 // }
RodColeman 0:0791c1fece8e 36
RodColeman 0:0791c1fece8e 37 /**
RodColeman 0:0791c1fece8e 38 * If a new RPCRequest Header is complete received the server will call this function.
RodColeman 0:0791c1fece8e 39 * This is the right place for preparing our datastructures.
RodColeman 0:0791c1fece8e 40 * Furthermore we will execute the rpc call and store the anwere.
RodColeman 0:0791c1fece8e 41 * But we will not send a response. This will be hapen in the send method.
RodColeman 0:0791c1fece8e 42 */
RodColeman 0:0791c1fece8e 43 virtual HTTPStatus init(HTTPConnection *con) const {
RodColeman 0:0791c1fece8e 44 HTTPRPCData *data = new HTTPRPCData();
RodColeman 0:0791c1fece8e 45 con->data = data;
RodColeman 0:0791c1fece8e 46 char *query = con->getURL()+strlen(_prefix);
RodColeman 0:0791c1fece8e 47 clean(query);
RodColeman 0:0791c1fece8e 48 rpc(query, data->result);
RodColeman 0:0791c1fece8e 49
RodColeman 0:0791c1fece8e 50 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";
RodColeman 0:0791c1fece8e 51 char *old = (char *)con->getHeaderFields();
RodColeman 0:0791c1fece8e 52 int oldlen = strlen(old);
RodColeman 0:0791c1fece8e 53 int atrlen = strlen(nfields);
RodColeman 0:0791c1fece8e 54 char *fields = new char[atrlen+oldlen+3];
RodColeman 0:0791c1fece8e 55 strcpy(fields,old);
RodColeman 0:0791c1fece8e 56 fields[oldlen+0] = '\r';
RodColeman 0:0791c1fece8e 57 fields[oldlen+1] = '\n';
RodColeman 0:0791c1fece8e 58 strcpy(&fields[oldlen+2], nfields);
RodColeman 0:0791c1fece8e 59 fields[atrlen+2+oldlen] = '\0';
RodColeman 0:0791c1fece8e 60 con->setHeaderFields(fields);
RodColeman 0:0791c1fece8e 61 if(*old) {
RodColeman 0:0791c1fece8e 62 delete old;
RodColeman 0:0791c1fece8e 63 }
RodColeman 0:0791c1fece8e 64
RodColeman 0:0791c1fece8e 65 con->setLength(strlen(data->result));
RodColeman 0:0791c1fece8e 66 return HTTP_OK;
RodColeman 0:0791c1fece8e 67 }
RodColeman 0:0791c1fece8e 68
RodColeman 0:0791c1fece8e 69 /**
RodColeman 0:0791c1fece8e 70 * If we got an POST request the send method will not be executed.
RodColeman 0:0791c1fece8e 71 * If we want to send data we have to trigger it the first time by ourself.
RodColeman 0:0791c1fece8e 72 * So we execute the send method.
RodColeman 0:0791c1fece8e 73 *
RodColeman 0:0791c1fece8e 74 * If the rpc call is the content of the POST body we would not be able to execute it.
RodColeman 0:0791c1fece8e 75 * Were parsing only the URL.
RodColeman 0:0791c1fece8e 76 */
RodColeman 0:0791c1fece8e 77 virtual HTTPHandle data(HTTPConnection *con, void *, int) const {
RodColeman 0:0791c1fece8e 78 return send(con, con->sndbuf());
RodColeman 0:0791c1fece8e 79 }
RodColeman 0:0791c1fece8e 80
RodColeman 0:0791c1fece8e 81 /**
RodColeman 0:0791c1fece8e 82 * Send the result back to the client.
RodColeman 0:0791c1fece8e 83 * If we have not enought space wait for next time.
RodColeman 0:0791c1fece8e 84 */
RodColeman 0:0791c1fece8e 85 virtual HTTPHandle send(HTTPConnection *con, int maximum) const {
RodColeman 0:0791c1fece8e 86 HTTPRPCData *data = static_cast<HTTPRPCData *>(con->data);
RodColeman 0:0791c1fece8e 87 if(maximum>64) {
RodColeman 0:0791c1fece8e 88 con->write(data->result, con->getLength());
RodColeman 0:0791c1fece8e 89 return HTTP_SuccessEnded;
RodColeman 0:0791c1fece8e 90 } else {
RodColeman 0:0791c1fece8e 91 // To less memory.
RodColeman 0:0791c1fece8e 92 return HTTP_SenderMemory;
RodColeman 0:0791c1fece8e 93 }
RodColeman 0:0791c1fece8e 94 }
RodColeman 0:0791c1fece8e 95
RodColeman 0:0791c1fece8e 96 /**
RodColeman 0:0791c1fece8e 97 * To reduce memory usage we sodify the URL directly
RodColeman 0:0791c1fece8e 98 * and replace '%20',',','+','=' with spaces.
RodColeman 0:0791c1fece8e 99 */
RodColeman 0:0791c1fece8e 100 inline void clean(char *str) const {
RodColeman 0:0791c1fece8e 101 while(*str++) {
RodColeman 0:0791c1fece8e 102 if(*str=='%'&&*(str+1)=='2'&&*(str+2)=='0') {
RodColeman 0:0791c1fece8e 103 *str = ' ';
RodColeman 0:0791c1fece8e 104 *(str+1) = ' ';
RodColeman 0:0791c1fece8e 105 *(str+2) = ' ';
RodColeman 0:0791c1fece8e 106 }
RodColeman 0:0791c1fece8e 107 if(*str==','||*str=='+'||*str=='=') {
RodColeman 0:0791c1fece8e 108 *str = ' ';
RodColeman 0:0791c1fece8e 109 }
RodColeman 0:0791c1fece8e 110 }
RodColeman 0:0791c1fece8e 111 }
RodColeman 0:0791c1fece8e 112 };
RodColeman 0:0791c1fece8e 113 #endif
RodColeman 0:0791c1fece8e 114
RodColeman 0:0791c1fece8e 115 #endif