/**
Performs an HTTP GET operation to the path at the address / port specified.
The data returned from the web server (up to maxresponse bytes) is written into the given buffer.
@param hostname The name of the host to connect to.
@param path The path on the server to connect to.
@param port The port to connect on - standard http port is 80
@param response The buffer read the response back into.
@param maxresponse An integer specifying the size of the response buffer.
@param headers (optional) An array of strings to be sent as headers - last element in the array must be 0.
@return the number of bytes received, or < 0 on error.
\b Example
\code
#define BUF_LENGTH 100
char myBuffer[BUF_LENGTH];
int justGot = webclientGet("www.makingthings.com", "/test/path", 80, myBuffer, BUF_LENGTH, 0);
\endcode
Now we should have the results of the HTTP GET from \b www.makingthings.com/test/path in \b myBuffer.
*/
int webclientGet(const char* hostname, const char* path, int port, char* response, int maxresponse, const char* headers[])
{
int s = tcpOpen(networkGetHostByName(hostname), port);
if (s > -1) {
// construct the GET request
int len = sniprintf(webclientBuf, WEBCLIENT_BUFFER_SIZE, "GET %s HTTP/1.1\r\n%s%s%s",
path,
(hostname != NULL) ? "Host: " : "",
(hostname != NULL) ? hostname : "",
(hostname != NULL) ? "\r\n" : "" );
tcpWrite(s, webclientBuf, len);
if (headers != NULL) {
for ( ; *headers != 0; headers++) {
tcpWrite(s, *headers, strlen(*headers));
tcpWrite(s, "\r\n", 2);
}
}
if (tcpWrite(s, "\r\n", 2 ) < 0) { // all done with headers...just check our last write here...
tcpClose(s);
return -1;
}
// read the data into the given buffer until there's none left, or the passed in buffer is full
len = webclientReadResponse(s, response, maxresponse);
tcpClose(s);
return len;
}
return -1;
}
/**
Performs an HTTP POST operation to the path at the address / port specified.
A buffer with the data to be POSTed is passed in, and up to maxresponse bytes of the response
from the server are written back into the same buffer.
@param hostname The name of the host to connect to.
@param path The path on the server to post to.
@param port The port to connect on - standard http port is 80
@param data The buffer to write from, and then read the response back into
@param data_length The number of bytes to write from \b data
@param maxresponse How many bytes of the response to read back into \b data
@param headers (optional) An array of strings to be sent as headers - last element in the array must be 0.
@return The number of bytes written, or -1 on failure.
\b Example
\code
// we'll post a test message to www.makingthings.com/post/path
int bufLength = 100;
char myBuffer[bufLength];
int datalength = siprintf(myBuffer, "A test message to post"); // load the buffer with some data to send
webclientPost("www.makingthings.com", "/post/path", 80, myBuffer, datalength, bufLength, 0);
\endcode
*/
int webclientPost(const char* hostname, const char* path, int port, char* data, int data_length, int maxresponse, const char* headers[])
{
int s = tcpOpen(networkGetHostByName(hostname), port);
if (s > -1) {
int len = sniprintf(webclientBuf, WEBCLIENT_BUFFER_SIZE,
"POST %s HTTP/1.1\r\nContent-Length: %d\r\n%s%s%s",
path, data_length,
(hostname != NULL) ? "Host: " : "",
(hostname != NULL) ? hostname : "",
(hostname != NULL) ? "\r\n" : "");
tcpWrite(s, webclientBuf, len);
if (headers != NULL) {
for ( ; *headers != 0; headers++) {
tcpWrite(s, *headers, strlen(*headers));
tcpWrite(s, "\r\n", 2);
}
}
tcpWrite(s, "\r\n", 2); // all done with headers
// send the body...just check our last write here...
if (tcpWrite(s, data, data_length) <= 0) {
tcpClose(s);
return -1;
}
// read back the response
len = webclientReadResponse(s, data, maxresponse);
tcpClose(s);
return len;
}
return -1;
}
/*
* Write a log message out to all output channels.
*/
static void log_output(Logger *logger)
{
LOG_Output *out;
for (out = listHead(&logger->outputs); out; out = listNext(out)) {
pthread_mutex_lock(&out->output);
switch(out->type) {
case LOG_OT_UDP:
case LOG_OT_TCP:
case LOG_OT_FD:
tcpWrite(out->u.fd, bufGet(&logger->scratch),
bufLen(&logger->scratch));
break;
case LOG_OT_FILE:
case LOG_OT_FP:
fwrite(bufGet(&logger->scratch),
bufLen(&logger->scratch), 1, out->u.fp);
fflush(out->u.fp);
break;
case LOG_OT_SYSLOG:
syslog(out->u.priority, "%s", bufGet(&logger->scratch));
break;
}
pthread_mutex_unlock(&out->output);
}
}
int tcpWrite(const int fd, const std::string& msg) {
return tcpWrite(fd, msg.c_str(), msg.length());
}
