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TinyHTTP.cpp@2:764ecec3dc59, 2011-07-28 (annotated)

Committer:: okini3939
Date:: Thu Jul 28 16:35:09 2011 +0000
Revision:: 2:764ecec3dc59
Parent:: 1:9f15e579d914

Who changed what in which revision?

User	Revision	Line number	New contents of line
okini3939	0:f2bf5f966801	1	/*
okini3939	0:f2bf5f966801	2	* mbed Tiny HTTP Client
okini3939	0:f2bf5f966801	3	* Copyright (c) 2011 Hiroshi Suga
okini3939	0:f2bf5f966801	4	* Released under the MIT License: http://mbed.org/license/mit
okini3939	0:f2bf5f966801	5	*/
okini3939	0:f2bf5f966801	6
okini3939	0:f2bf5f966801	7	/** @file
okini3939	0:f2bf5f966801	8	* @brief Tiny HTTP Client
okini3939	0:f2bf5f966801	9	*/
okini3939	0:f2bf5f966801	10
okini3939	0:f2bf5f966801	11	#include "mbed.h"
okini3939	0:f2bf5f966801	12	#include "EthernetNetIf.h"
okini3939	0:f2bf5f966801	13	#include "TCPSocket.h"
okini3939	0:f2bf5f966801	14	#include "DNSRequest.h"
okini3939	0:f2bf5f966801	15	#include "TinyHTTP.h"
okini3939	2:764ecec3dc59	16	#include <ctype.h>
okini3939	0:f2bf5f966801	17
okini3939	0:f2bf5f966801	18
okini3939	0:f2bf5f966801	19	TCPSocket *http;
okini3939	2:764ecec3dc59	20	volatile int tcp_ready, tcp_readable, tcp_writable;
okini3939	2:764ecec3dc59	21	volatile int dns_status;
okini3939	0:f2bf5f966801	22
okini3939	0:f2bf5f966801	23	// Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
okini3939	2:764ecec3dc59	24	int base64enc(const char input, unsigned int length, char output, int len) {
okini3939	0:f2bf5f966801	25	static const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
okini3939	0:f2bf5f966801	26	unsigned int c, c1, c2, c3;
okini3939	2:764ecec3dc59	27
okini3939	2:764ecec3dc59	28	if (len < ((((length-1)/3)+1)<<2)) return -1;
okini3939	0:f2bf5f966801	29	for(unsigned int i = 0, j = 0; i<length; i+=3,j+=4) {
okini3939	0:f2bf5f966801	30	c1 = ((((unsigned char)((unsigned char )&input[i]))));
okini3939	0:f2bf5f966801	31	c2 = (length>i+1)?((((unsigned char)((unsigned char )&input[i+1])))):0;
okini3939	0:f2bf5f966801	32	c3 = (length>i+2)?((((unsigned char)((unsigned char )&input[i+2])))):0;
okini3939	0:f2bf5f966801	33
okini3939	0:f2bf5f966801	34	c = ((c1 & 0xFC) >> 2);
okini3939	0:f2bf5f966801	35	output[j+0] = base64[c];
okini3939	0:f2bf5f966801	36	c = ((c1 & 0x03) << 4) \| ((c2 & 0xF0) >> 4);
okini3939	0:f2bf5f966801	37	output[j+1] = base64[c];
okini3939	0:f2bf5f966801	38	c = ((c2 & 0x0F) << 2) \| ((c3 & 0xC0) >> 6);
okini3939	0:f2bf5f966801	39	output[j+2] = (length>i+1)?base64[c]:'=';
okini3939	0:f2bf5f966801	40	c = (c3 & 0x3F);
okini3939	0:f2bf5f966801	41	output[j+3] = (length>i+2)?base64[c]:'=';
okini3939	0:f2bf5f966801	42	}
okini3939	0:f2bf5f966801	43	output[(((length-1)/3)+1)<<2] = '\0';
okini3939	2:764ecec3dc59	44	return 0;
okini3939	0:f2bf5f966801	45	}
okini3939	2:764ecec3dc59	46
okini3939	0:f2bf5f966801	47	// Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
okini3939	2:764ecec3dc59	48	int urlencode(char str, char buf, int len) {
okini3939	2:764ecec3dc59	49	static const char to_hex[] = "0123456789ABCDEF";
okini3939	0:f2bf5f966801	50	// char pstr = str, buf = (char)malloc(strlen(str) 3 + 1), *pbuf = buf;
okini3939	0:f2bf5f966801	51	char pstr = str, pbuf = buf;
okini3939	2:764ecec3dc59	52
okini3939	2:764ecec3dc59	53	if (len < (strlen(str) * 3 + 1)) return -1;
okini3939	0:f2bf5f966801	54	while (*pstr) {
okini3939	2:764ecec3dc59	55	if (isalnum(pstr) \|\| pstr == '-' \|\| pstr == '_' \|\| pstr == '.' \|\| *pstr == '~') {
okini3939	0:f2bf5f966801	56	pbuf++ = pstr;
okini3939	2:764ecec3dc59	57	} else if (*pstr == ' ') {
okini3939	0:f2bf5f966801	58	*pbuf++ = '+';
okini3939	2:764ecec3dc59	59	} else {
okini3939	2:764ecec3dc59	60	*pbuf++ = '%';
okini3939	2:764ecec3dc59	61	pbuf++ = to_hex[(pstr >> 4) & 0x0f];
okini3939	2:764ecec3dc59	62	pbuf++ = to_hex[pstr & 0x0f];
okini3939	2:764ecec3dc59	63	}
okini3939	0:f2bf5f966801	64	pstr++;
okini3939	0:f2bf5f966801	65	}
okini3939	0:f2bf5f966801	66	*pbuf = '\0';
okini3939	0:f2bf5f966801	67	return 0;
okini3939	0:f2bf5f966801	68	}
okini3939	2:764ecec3dc59	69
okini3939	0:f2bf5f966801	70
okini3939	0:f2bf5f966801	71	void isr_http (TCPSocketEvent e) {
okini3939	0:f2bf5f966801	72
okini3939	0:f2bf5f966801	73	#ifdef DEBUG
okini3939	0:f2bf5f966801	74	printf("tcp(%d)\r\n", e);
okini3939	0:f2bf5f966801	75	#endif
okini3939	0:f2bf5f966801	76	switch(e) {
okini3939	2:764ecec3dc59	77	case TCPSOCKET_CONNECTED:
okini3939	2:764ecec3dc59	78	tcp_ready = 1;
okini3939	0:f2bf5f966801	79	break;
okini3939	0:f2bf5f966801	80
okini3939	2:764ecec3dc59	81	case TCPSOCKET_READABLE: //Incoming data
okini3939	2:764ecec3dc59	82	tcp_readable = 1;
okini3939	2:764ecec3dc59	83	break;
okini3939	2:764ecec3dc59	84
okini3939	0:f2bf5f966801	85	case TCPSOCKET_WRITEABLE: //We can send data
okini3939	2:764ecec3dc59	86	tcp_writable = 1;
okini3939	0:f2bf5f966801	87	break;
okini3939	0:f2bf5f966801	88
okini3939	0:f2bf5f966801	89	case TCPSOCKET_CONTIMEOUT:
okini3939	0:f2bf5f966801	90	case TCPSOCKET_CONRST:
okini3939	0:f2bf5f966801	91	case TCPSOCKET_CONABRT:
okini3939	0:f2bf5f966801	92	case TCPSOCKET_ERROR:
okini3939	0:f2bf5f966801	93	case TCPSOCKET_DISCONNECTED:
okini3939	2:764ecec3dc59	94	tcp_ready = 0;
okini3939	0:f2bf5f966801	95	break;
okini3939	0:f2bf5f966801	96	}
okini3939	0:f2bf5f966801	97	}
okini3939	0:f2bf5f966801	98
okini3939	2:764ecec3dc59	99	void createauth (char user, char pwd, char *buf, int len) {
okini3939	0:f2bf5f966801	100	char tmp[80];
okini3939	0:f2bf5f966801	101
okini3939	2:764ecec3dc59	102	strncpy(buf, "Authorization: Basic ", len);
okini3939	2:764ecec3dc59	103	snprintf(tmp, sizeof(tmp), "%s:%s", user, pwd);
okini3939	2:764ecec3dc59	104	base64enc(tmp, strlen(tmp), &buf[strlen(buf)], len - strlen(buf));
okini3939	2:764ecec3dc59	105	strncat(buf, "\r\n", len - strlen(buf));
okini3939	0:f2bf5f966801	106	}
okini3939	0:f2bf5f966801	107
okini3939	0:f2bf5f966801	108	void isr_dns (DNSReply r) {
okini3939	0:f2bf5f966801	109
okini3939	2:764ecec3dc59	110	#ifdef DEBUG
okini3939	2:764ecec3dc59	111	printf("dns(%d)\r\n", r);
okini3939	2:764ecec3dc59	112	#endif
okini3939	0:f2bf5f966801	113	if (DNS_FOUND) {
okini3939	0:f2bf5f966801	114	dns_status = 1;
okini3939	0:f2bf5f966801	115	} else {
okini3939	0:f2bf5f966801	116	dns_status = -1;
okini3939	0:f2bf5f966801	117	}
okini3939	0:f2bf5f966801	118	}
okini3939	0:f2bf5f966801	119
okini3939	0:f2bf5f966801	120	int httpRequest (int method, Host host, char uri, char head, char body) {
okini3939	0:f2bf5f966801	121	TCPSocketErr err;
okini3939	2:764ecec3dc59	122	Timer timeout;
okini3939	2:764ecec3dc59	123	char buf[1500];
okini3939	0:f2bf5f966801	124	int i, ret = -1;
okini3939	0:f2bf5f966801	125
okini3939	0:f2bf5f966801	126	http = new TCPSocket;
okini3939	2:764ecec3dc59	127	tcp_ready = 0;
okini3939	2:764ecec3dc59	128	tcp_readable = 0;
okini3939	2:764ecec3dc59	129	tcp_writable = 0;
okini3939	0:f2bf5f966801	130
okini3939	0:f2bf5f966801	131	http->setOnEvent(isr_http);
okini3939	0:f2bf5f966801	132
okini3939	0:f2bf5f966801	133	// connect
okini3939	0:f2bf5f966801	134	if (host->getIp().isNull()) {
okini3939	2:764ecec3dc59	135	// resolv
okini3939	0:f2bf5f966801	136	DNSRequest dns;
okini3939	0:f2bf5f966801	137	dns_status = 0;
okini3939	0:f2bf5f966801	138	dns.setOnReply(isr_dns);
okini3939	0:f2bf5f966801	139	if (dns.resolve(host) != DNS_OK) goto exit;
okini3939	2:764ecec3dc59	140	timeout.reset();
okini3939	2:764ecec3dc59	141	timeout.start();
okini3939	2:764ecec3dc59	142	while (timeout.read_ms() < HTTP_TIMEOUT) {
okini3939	0:f2bf5f966801	143	if (dns_status) break;
okini3939	0:f2bf5f966801	144	Net::poll();
okini3939	0:f2bf5f966801	145	}
okini3939	2:764ecec3dc59	146	timeout.stop();
okini3939	2:764ecec3dc59	147	if (dns_status <= 0) goto exit;
okini3939	2:764ecec3dc59	148	#ifdef DEBUG
okini3939	2:764ecec3dc59	149	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]);
okini3939	2:764ecec3dc59	150	#endif
okini3939	0:f2bf5f966801	151	}
okini3939	0:f2bf5f966801	152	if (! host->getPort()) {
okini3939	0:f2bf5f966801	153	host->setPort(HTTP_PORT);
okini3939	0:f2bf5f966801	154	}
okini3939	0:f2bf5f966801	155	err = http->connect(*host);
okini3939	0:f2bf5f966801	156	if (err != TCPSOCKET_OK) goto exit;
okini3939	0:f2bf5f966801	157
okini3939	0:f2bf5f966801	158	// wait connect
okini3939	2:764ecec3dc59	159	timeout.reset();
okini3939	2:764ecec3dc59	160	timeout.start();
okini3939	2:764ecec3dc59	161	while (timeout.read_ms() < HTTP_TIMEOUT) {
okini3939	2:764ecec3dc59	162	if (tcp_ready) break;
okini3939	0:f2bf5f966801	163	Net::poll();
okini3939	0:f2bf5f966801	164	}
okini3939	2:764ecec3dc59	165	timeout.stop();
okini3939	2:764ecec3dc59	166	if (! tcp_ready) goto exit;
okini3939	0:f2bf5f966801	167
okini3939	0:f2bf5f966801	168	// send request
okini3939	0:f2bf5f966801	169	if (method == METHOD_POST) {
okini3939	0:f2bf5f966801	170	http->send("POST ", 5);
okini3939	0:f2bf5f966801	171	} else {
okini3939	0:f2bf5f966801	172	http->send("GET ", 4);
okini3939	0:f2bf5f966801	173	}
okini3939	0:f2bf5f966801	174	http->send(uri, strlen(uri));
okini3939	0:f2bf5f966801	175	http->send(" HTTP/1.1\r\nHost: ", 17);
okini3939	0:f2bf5f966801	176	http->send(host->getName(), strlen(host->getName()));
okini3939	0:f2bf5f966801	177	http->send("\r\n", 2);
okini3939	1:9f15e579d914	178	http->send("Connection: close\r\n", 19);
okini3939	0:f2bf5f966801	179	if (head) {
okini3939	0:f2bf5f966801	180	http->send(head, strlen(head));
okini3939	0:f2bf5f966801	181	}
okini3939	0:f2bf5f966801	182	if (method == METHOD_POST) {
okini3939	0:f2bf5f966801	183	sprintf(buf, "Content-Length: %d\r\n", strlen(body));
okini3939	0:f2bf5f966801	184	http->send(buf, strlen(buf));
okini3939	0:f2bf5f966801	185	}
okini3939	0:f2bf5f966801	186	http->send("\r\n", 2);
okini3939	0:f2bf5f966801	187
okini3939	0:f2bf5f966801	188	// post method
okini3939	0:f2bf5f966801	189	if (method == METHOD_POST && body) {
okini3939	0:f2bf5f966801	190	http->send(body, strlen(body));
okini3939	0:f2bf5f966801	191	}
okini3939	0:f2bf5f966801	192
okini3939	0:f2bf5f966801	193	// wait responce
okini3939	2:764ecec3dc59	194	timeout.reset();
okini3939	2:764ecec3dc59	195	timeout.start();
okini3939	2:764ecec3dc59	196	while (timeout.read_ms() < HTTP_TIMEOUT) {
okini3939	2:764ecec3dc59	197	if (tcp_readable) break;
okini3939	0:f2bf5f966801	198	Net::poll();
okini3939	0:f2bf5f966801	199	}
okini3939	2:764ecec3dc59	200	timeout.stop();
okini3939	2:764ecec3dc59	201	if (! tcp_readable) goto exit;
okini3939	0:f2bf5f966801	202
okini3939	0:f2bf5f966801	203	// recv responce
okini3939	2:764ecec3dc59	204	i = http->recv(buf, sizeof(buf) - 1);
okini3939	0:f2bf5f966801	205	buf[i] = 0;
okini3939	2:764ecec3dc59	206	if (i < sizeof(buf) - 1) tcp_readable = 0;
okini3939	2:764ecec3dc59	207	if (strncmp(buf, "HTTP/", 5) == 0) {
okini3939	0:f2bf5f966801	208	ret = atoi(&buf[9]);
okini3939	0:f2bf5f966801	209	}
okini3939	0:f2bf5f966801	210	#ifdef DEBUG
okini3939	0:f2bf5f966801	211	printf(buf);
okini3939	0:f2bf5f966801	212	#endif
okini3939	0:f2bf5f966801	213
okini3939	0:f2bf5f966801	214	// recv dummy
okini3939	2:764ecec3dc59	215	timeout.reset();
okini3939	2:764ecec3dc59	216	timeout.start();
okini3939	2:764ecec3dc59	217	while (timeout.read_ms() < HTTP_TIMEOUT) {
okini3939	2:764ecec3dc59	218	if (tcp_readable) {
okini3939	2:764ecec3dc59	219	i = http->recv(buf, sizeof(buf) - 1);
okini3939	2:764ecec3dc59	220	buf[i] = 0;
okini3939	2:764ecec3dc59	221	if (i < sizeof(buf) - 1) tcp_readable = 0;
okini3939	0:f2bf5f966801	222	#ifdef DEBUG
okini3939	0:f2bf5f966801	223	printf(buf);
okini3939	0:f2bf5f966801	224	#endif
okini3939	2:764ecec3dc59	225	timeout.reset();
okini3939	2:764ecec3dc59	226	} else
okini3939	2:764ecec3dc59	227	if (! tcp_ready) {
okini3939	0:f2bf5f966801	228	break;
okini3939	0:f2bf5f966801	229	}
okini3939	0:f2bf5f966801	230	Net::poll();
okini3939	0:f2bf5f966801	231	}
okini3939	2:764ecec3dc59	232	timeout.stop();
okini3939	0:f2bf5f966801	233
okini3939	0:f2bf5f966801	234	exit:
okini3939	0:f2bf5f966801	235	http->resetOnEvent();
okini3939	0:f2bf5f966801	236	http->close();
okini3939	0:f2bf5f966801	237	delete http;
okini3939	0:f2bf5f966801	238
okini3939	0:f2bf5f966801	239	return ret;
okini3939	0:f2bf5f966801	240	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	27 Jul 2021
Imports:	0
Forks:	0
Commits:	4
Dependents:	0
Dependencies:	2
Followers:	1

TinyHTTP.cpp@2:764ecec3dc59, 2011-07-28 (annotated)

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