Tiny HTTP Client http://mbed.org/users/okini3939/notebook/tinyhttp
Dependencies: EthernetNetIf mbed
TinyHTTP.cpp
00001 /* 00002 * mbed Tiny HTTP Client 00003 * Copyright (c) 2011 Hiroshi Suga 00004 * Released under the MIT License: http://mbed.org/license/mit 00005 */ 00006 00007 /** @file 00008 * @brief Tiny HTTP Client 00009 */ 00010 00011 #include "mbed.h" 00012 #include "EthernetNetIf.h" 00013 #include "TCPSocket.h" 00014 #include "DNSRequest.h" 00015 #include "TinyHTTP.h" 00016 #include <ctype.h> 00017 00018 00019 TCPSocket *http; 00020 volatile int tcp_ready, tcp_readable, tcp_writable; 00021 volatile int dns_status; 00022 00023 // Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) 00024 int base64enc(const char *input, unsigned int length, char *output, int len) { 00025 static const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 00026 unsigned int c, c1, c2, c3; 00027 00028 if (len < ((((length-1)/3)+1)<<2)) return -1; 00029 for(unsigned int i = 0, j = 0; i<length; i+=3,j+=4) { 00030 c1 = ((((unsigned char)*((unsigned char *)&input[i])))); 00031 c2 = (length>i+1)?((((unsigned char)*((unsigned char *)&input[i+1])))):0; 00032 c3 = (length>i+2)?((((unsigned char)*((unsigned char *)&input[i+2])))):0; 00033 00034 c = ((c1 & 0xFC) >> 2); 00035 output[j+0] = base64[c]; 00036 c = ((c1 & 0x03) << 4) | ((c2 & 0xF0) >> 4); 00037 output[j+1] = base64[c]; 00038 c = ((c2 & 0x0F) << 2) | ((c3 & 0xC0) >> 6); 00039 output[j+2] = (length>i+1)?base64[c]:'='; 00040 c = (c3 & 0x3F); 00041 output[j+3] = (length>i+2)?base64[c]:'='; 00042 } 00043 output[(((length-1)/3)+1)<<2] = '\0'; 00044 return 0; 00045 } 00046 00047 // Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) 00048 int urlencode(char *str, char *buf, int len) { 00049 static const char to_hex[] = "0123456789ABCDEF"; 00050 // char *pstr = str, *buf = (char*)malloc(strlen(str) * 3 + 1), *pbuf = buf; 00051 char *pstr = str, *pbuf = buf; 00052 00053 if (len < (strlen(str) * 3 + 1)) return -1; 00054 while (*pstr) { 00055 if (isalnum(*pstr) || *pstr == '-' || *pstr == '_' || *pstr == '.' || *pstr == '~') { 00056 *pbuf++ = *pstr; 00057 } else if (*pstr == ' ') { 00058 *pbuf++ = '+'; 00059 } else { 00060 *pbuf++ = '%'; 00061 *pbuf++ = to_hex[(*pstr >> 4) & 0x0f]; 00062 *pbuf++ = to_hex[*pstr & 0x0f]; 00063 } 00064 pstr++; 00065 } 00066 *pbuf = '\0'; 00067 return 0; 00068 } 00069 00070 00071 void isr_http (TCPSocketEvent e) { 00072 00073 #ifdef DEBUG 00074 printf("tcp(%d)\r\n", e); 00075 #endif 00076 switch(e) { 00077 case TCPSOCKET_CONNECTED: 00078 tcp_ready = 1; 00079 break; 00080 00081 case TCPSOCKET_READABLE: //Incoming data 00082 tcp_readable = 1; 00083 break; 00084 00085 case TCPSOCKET_WRITEABLE: //We can send data 00086 tcp_writable = 1; 00087 break; 00088 00089 case TCPSOCKET_CONTIMEOUT: 00090 case TCPSOCKET_CONRST: 00091 case TCPSOCKET_CONABRT: 00092 case TCPSOCKET_ERROR: 00093 case TCPSOCKET_DISCONNECTED: 00094 tcp_ready = 0; 00095 break; 00096 } 00097 } 00098 00099 void createauth (char *user, char *pwd, char *buf, int len) { 00100 char tmp[80]; 00101 00102 strncpy(buf, "Authorization: Basic ", len); 00103 snprintf(tmp, sizeof(tmp), "%s:%s", user, pwd); 00104 base64enc(tmp, strlen(tmp), &buf[strlen(buf)], len - strlen(buf)); 00105 strncat(buf, "\r\n", len - strlen(buf)); 00106 } 00107 00108 void isr_dns (DNSReply r) { 00109 00110 #ifdef DEBUG 00111 printf("dns(%d)\r\n", r); 00112 #endif 00113 if (DNS_FOUND) { 00114 dns_status = 1; 00115 } else { 00116 dns_status = -1; 00117 } 00118 } 00119 00120 int httpRequest (int method, Host *host, char *uri, char *head, char *body) { 00121 TCPSocketErr err; 00122 Timer timeout; 00123 char buf[1500]; 00124 int i, ret = -1; 00125 00126 http = new TCPSocket; 00127 tcp_ready = 0; 00128 tcp_readable = 0; 00129 tcp_writable = 0; 00130 00131 http->setOnEvent(isr_http); 00132 00133 // connect 00134 if (host->getIp().isNull()) { 00135 // resolv 00136 DNSRequest dns; 00137 dns_status = 0; 00138 dns.setOnReply(isr_dns); 00139 if (dns.resolve(host) != DNS_OK) goto exit; 00140 timeout.reset(); 00141 timeout.start(); 00142 while (timeout.read_ms() < HTTP_TIMEOUT) { 00143 if (dns_status) break; 00144 Net::poll(); 00145 } 00146 timeout.stop(); 00147 if (dns_status <= 0) goto exit; 00148 #ifdef DEBUG 00149 printf("%s [%d.%d.%d.%d]\r\n", host->getName(), (unsigned char)host->getIp()[0], (unsigned char)host->getIp()[1], (unsigned char)host->getIp()[2], (unsigned char)host->getIp()[3]); 00150 #endif 00151 } 00152 if (! host->getPort()) { 00153 host->setPort(HTTP_PORT); 00154 } 00155 err = http->connect(*host); 00156 if (err != TCPSOCKET_OK) goto exit; 00157 00158 // wait connect 00159 timeout.reset(); 00160 timeout.start(); 00161 while (timeout.read_ms() < HTTP_TIMEOUT) { 00162 if (tcp_ready) break; 00163 Net::poll(); 00164 } 00165 timeout.stop(); 00166 if (! tcp_ready) goto exit; 00167 00168 // send request 00169 if (method == METHOD_POST) { 00170 http->send("POST ", 5); 00171 } else { 00172 http->send("GET ", 4); 00173 } 00174 http->send(uri, strlen(uri)); 00175 http->send(" HTTP/1.1\r\nHost: ", 17); 00176 http->send(host->getName(), strlen(host->getName())); 00177 http->send("\r\n", 2); 00178 http->send("Connection: close\r\n", 19); 00179 if (head) { 00180 http->send(head, strlen(head)); 00181 } 00182 if (method == METHOD_POST) { 00183 sprintf(buf, "Content-Length: %d\r\n", strlen(body)); 00184 http->send(buf, strlen(buf)); 00185 } 00186 http->send("\r\n", 2); 00187 00188 // post method 00189 if (method == METHOD_POST && body) { 00190 http->send(body, strlen(body)); 00191 } 00192 00193 // wait responce 00194 timeout.reset(); 00195 timeout.start(); 00196 while (timeout.read_ms() < HTTP_TIMEOUT) { 00197 if (tcp_readable) break; 00198 Net::poll(); 00199 } 00200 timeout.stop(); 00201 if (! tcp_readable) goto exit; 00202 00203 // recv responce 00204 i = http->recv(buf, sizeof(buf) - 1); 00205 buf[i] = 0; 00206 if (i < sizeof(buf) - 1) tcp_readable = 0; 00207 if (strncmp(buf, "HTTP/", 5) == 0) { 00208 ret = atoi(&buf[9]); 00209 } 00210 #ifdef DEBUG 00211 printf(buf); 00212 #endif 00213 00214 // recv dummy 00215 timeout.reset(); 00216 timeout.start(); 00217 while (timeout.read_ms() < HTTP_TIMEOUT) { 00218 if (tcp_readable) { 00219 i = http->recv(buf, sizeof(buf) - 1); 00220 buf[i] = 0; 00221 if (i < sizeof(buf) - 1) tcp_readable = 0; 00222 #ifdef DEBUG 00223 printf(buf); 00224 #endif 00225 timeout.reset(); 00226 } else 00227 if (! tcp_ready) { 00228 break; 00229 } 00230 Net::poll(); 00231 } 00232 timeout.stop(); 00233 00234 exit: 00235 http->resetOnEvent(); 00236 http->close(); 00237 delete http; 00238 00239 return ret; 00240 }
Generated on Wed Jul 13 2022 22:19:11 by 1.7.2