![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
h
Dependencies: mbed EthernetNetIf
TinyHTTP.cpp
- Committer:
- okini3939
- Date:
- 2011-07-27
- Revision:
- 1:9f15e579d914
- Parent:
- 0:f2bf5f966801
- Child:
- 2:764ecec3dc59
File content as of revision 1:9f15e579d914:
/* * mbed Tiny HTTP Client * Copyright (c) 2011 Hiroshi Suga * Released under the MIT License: http://mbed.org/license/mit */ /** @file * @brief Tiny HTTP Client */ #include "mbed.h" #include "EthernetNetIf.h" #include "TCPSocket.h" #include "DNSRequest.h" #include "TinyHTTP.h" #define STATUS_NONE 0 #define STATUS_READABLE 1 #define STATUS_CONNECTED 2 #define STATUS_ERROR 3 #define STATUS_DISCONNECTED 4 TCPSocket *http; volatile int tcp_status = 0, dns_status = 0; // Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) void base64enc(const char *input, unsigned int length, char *output) { static const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; unsigned int c, c1, c2, c3; for(unsigned int i = 0, j = 0; i<length; i+=3,j+=4) { c1 = ((((unsigned char)*((unsigned char *)&input[i])))); c2 = (length>i+1)?((((unsigned char)*((unsigned char *)&input[i+1])))):0; c3 = (length>i+2)?((((unsigned char)*((unsigned char *)&input[i+2])))):0; c = ((c1 & 0xFC) >> 2); output[j+0] = base64[c]; c = ((c1 & 0x03) << 4) | ((c2 & 0xF0) >> 4); output[j+1] = base64[c]; c = ((c2 & 0x0F) << 2) | ((c3 & 0xC0) >> 6); output[j+2] = (length>i+1)?base64[c]:'='; c = (c3 & 0x3F); output[j+3] = (length>i+2)?base64[c]:'='; } output[(((length-1)/3)+1)<<2] = '\0'; } /* // Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) int url_encode(char *str, char *buf, int len) { // char *pstr = str, *buf = (char*)malloc(strlen(str) * 3 + 1), *pbuf = buf; if (len < strlen(str) * 3 + 1) return -1; char *pstr = str, *pbuf = buf; while (*pstr) { if (isalnum(*pstr) || *pstr == '-' || *pstr == '_' || *pstr == '.' || *pstr == '~') *pbuf++ = *pstr; else if (*pstr == ' ') *pbuf++ = '+'; else *pbuf++ = '%', *pbuf++ = to_hex(*pstr >> 4), *pbuf++ = to_hex(*pstr & 15); pstr++; } *pbuf = '\0'; return 0; } */ void isr_http (TCPSocketEvent e) { #ifdef DEBUG printf("tcp(%d)\r\n", e); #endif switch(e) { case TCPSOCKET_READABLE: //Incoming data tcp_status = STATUS_READABLE; break; case TCPSOCKET_CONNECTED: case TCPSOCKET_WRITEABLE: //We can send data tcp_status = STATUS_CONNECTED; break; case TCPSOCKET_CONTIMEOUT: case TCPSOCKET_CONRST: case TCPSOCKET_CONABRT: case TCPSOCKET_ERROR: tcp_status = STATUS_ERROR; break; case TCPSOCKET_DISCONNECTED: tcp_status = STATUS_DISCONNECTED; break; } } void createauth (char *user, char *pwd, char *buf) { char tmp[80]; snprintf(tmp, sizeof(tmp), "Authorization: Basic %s:%s\n", user, pwd); base64enc(tmp, strlen(tmp), buf); } void isr_dns (DNSReply r) { if (DNS_FOUND) { dns_status = 1; } else { dns_status = -1; } } int httpRequest (int method, Host *host, char *uri, char *head, char *body) { TCPSocketErr err; char buf[500]; int i, ret = -1; http = new TCPSocket; tcp_status = STATUS_NONE; http->setOnEvent(isr_http); // connect if (host->getIp().isNull()) { DNSRequest dns; dns_status = 0; dns.setOnReply(isr_dns); if (dns.resolve(host) != DNS_OK) goto exit; for (i = 0; i < HTTP_TIMEOUT / 10; i ++) { if (dns_status) break; Net::poll(); wait_ms(10); } while (dns_status < 0) goto exit; } if (! host->getPort()) { host->setPort(HTTP_PORT); } err = http->connect(*host); if (err != TCPSOCKET_OK) goto exit; // wait connect for (i = 0; i < HTTP_TIMEOUT / 10; i ++) { if (tcp_status != STATUS_NONE) break; Net::poll(); wait_ms(10); } if (tcp_status != STATUS_CONNECTED) goto exit; // send request if (method == METHOD_POST) { http->send("POST ", 5); } else { http->send("GET ", 4); } http->send(uri, strlen(uri)); http->send(" HTTP/1.1\r\nHost: ", 17); http->send(host->getName(), strlen(host->getName())); http->send("\r\n", 2); http->send("Connection: close\r\n", 19); if (head) { http->send(head, strlen(head)); } if (method == METHOD_POST) { sprintf(buf, "Content-Length: %d\r\n", strlen(body)); http->send(buf, strlen(buf)); } http->send("\r\n", 2); // post method if (method == METHOD_POST && body) { http->send(body, strlen(body)); } // wait responce for (i = 0; i < 1500; i ++) { if (tcp_status != STATUS_CONNECTED) break; Net::poll(); wait_ms(10); } if (tcp_status != STATUS_READABLE) goto exit; // recv responce i = http->recv(buf, sizeof(buf)); buf[i] = 0; if (strncmp(buf, "HTTP", 4) == 0) { ret = atoi(&buf[9]); } #ifdef DEBUG printf(buf); #endif // recv dummy for (i = 0; i < HTTP_TIMEOUT / 10; i ++) { switch (tcp_status) { case STATUS_READABLE: int n = http->recv(buf, sizeof(buf)); buf[n] = 0; i = 0; #ifdef DEBUG printf(buf); #endif break; case STATUS_DISCONNECTED: case STATUS_ERROR: goto exit; } Net::poll(); wait_ms(10); } exit: http->resetOnEvent(); http->close(); delete http; return ret; }