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nanohttp.c
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nanohttp.c
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/*
* nanohttp.c: minimalist HTTP GET implementation to fetch external subsets.
* focuses on size, streamability, reentrancy and portability
*
* This is clearly not a general purpose HTTP implementation
* If you look for one, check:
* http://www.w3.org/Library/
*
* See Copyright for the status of this software.
*
*/
#define IN_LIBXML
#include "libxml.h"
#ifdef LIBXML_HTTP_ENABLED
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <errno.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#elif defined (_WIN32)
#include <io.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_IO_H
#include <io.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifndef HAVE_POLL_H
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#else
#include <poll.h>
#endif
#ifdef LIBXML_ZLIB_ENABLED
#include <zlib.h>
#endif
#ifdef VMS
#include <stropts>
#define XML_SOCKLEN_T unsigned int
#endif
#if defined(_WIN32)
#include <wsockcompat.h>
#endif
#include <libxml/xmlerror.h>
#include <libxml/xmlmemory.h>
#include <libxml/parser.h> /* for xmlStr(n)casecmp() */
#include <libxml/nanohttp.h>
#include <libxml/uri.h>
#include "private/error.h"
#include "private/io.h"
/**
* A couple portability macros
*/
#ifndef _WINSOCKAPI_
#define closesocket(s) close(s)
#define SOCKET int
#define INVALID_SOCKET (-1)
#endif
#ifndef XML_SOCKLEN_T
#define XML_SOCKLEN_T unsigned int
#endif
#define GETHOSTBYNAME_ARG_CAST (char *)
#define SEND_ARG2_CAST (char *)
#ifdef STANDALONE
#define xmlStrncasecmp(a, b, n) strncasecmp((char *)a, (char *)b, n)
#define xmlStrcasecmpi(a, b) strcasecmp((char *)a, (char *)b)
#endif
#define XML_NANO_HTTP_MAX_REDIR 10
#define XML_NANO_HTTP_CHUNK 4096
#define XML_NANO_HTTP_CLOSED 0
#define XML_NANO_HTTP_WRITE 1
#define XML_NANO_HTTP_READ 2
#define XML_NANO_HTTP_NONE 4
typedef struct xmlNanoHTTPCtxt {
char *protocol; /* the protocol name */
char *hostname; /* the host name */
int port; /* the port */
char *path; /* the path within the URL */
char *query; /* the query string */
SOCKET fd; /* the file descriptor for the socket */
int state; /* WRITE / READ / CLOSED */
char *out; /* buffer sent (zero terminated) */
char *outptr; /* index within the buffer sent */
char *in; /* the receiving buffer */
char *content; /* the start of the content */
char *inptr; /* the next byte to read from network */
char *inrptr; /* the next byte to give back to the client */
int inlen; /* len of the input buffer */
int last; /* return code for last operation */
int returnValue; /* the protocol return value */
int version; /* the protocol version */
int ContentLength; /* specified content length from HTTP header */
char *contentType; /* the MIME type for the input */
char *location; /* the new URL in case of redirect */
char *authHeader; /* contents of {WWW,Proxy}-Authenticate header */
char *encoding; /* encoding extracted from the contentType */
char *mimeType; /* Mime-Type extracted from the contentType */
#ifdef LIBXML_ZLIB_ENABLED
z_stream *strm; /* Zlib stream object */
int usesGzip; /* "Content-Encoding: gzip" was detected */
#endif
} xmlNanoHTTPCtxt, *xmlNanoHTTPCtxtPtr;
static int initialized = 0;
static char *proxy = NULL; /* the proxy name if any */
static int proxyPort; /* the proxy port if any */
static unsigned int timeout = 60;/* the select() timeout in seconds */
static int xmlNanoHTTPFetchContent( void * ctx, char ** ptr, int * len );
/**
* xmlHTTPErrMemory:
* @extra: extra information
*
* Handle an out of memory condition
*/
static void
xmlHTTPErrMemory(void)
{
xmlRaiseMemoryError(NULL, NULL, NULL, XML_FROM_HTTP, NULL);
}
/**
* A portability function
*/
static int socket_errno(void) {
#ifdef _WINSOCKAPI_
int err = WSAGetLastError();
switch(err) {
case WSAECONNRESET:
return(ECONNRESET);
case WSAEINPROGRESS:
return(EINPROGRESS);
case WSAEINTR:
return(EINTR);
case WSAESHUTDOWN:
return(ESHUTDOWN);
case WSAEWOULDBLOCK:
return(EWOULDBLOCK);
default:
return(err);
}
#else
return(errno);
#endif
}
/**
* xmlNanoHTTPInit:
*
* Initialize the HTTP protocol layer.
* Currently it just checks for proxy information
*/
void
xmlNanoHTTPInit(void) {
const char *env;
#ifdef _WINSOCKAPI_
WSADATA wsaData;
#endif
if (initialized)
return;
#ifdef _WINSOCKAPI_
if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0)
return;
#endif
if (proxy == NULL) {
proxyPort = 80;
env = getenv("no_proxy");
if (env && ((env[0] == '*') && (env[1] == 0)))
goto done;
env = getenv("http_proxy");
if (env != NULL) {
xmlNanoHTTPScanProxy(env);
goto done;
}
env = getenv("HTTP_PROXY");
if (env != NULL) {
xmlNanoHTTPScanProxy(env);
goto done;
}
}
done:
initialized = 1;
}
/**
* xmlNanoHTTPCleanup:
*
* Cleanup the HTTP protocol layer.
*/
void
xmlNanoHTTPCleanup(void) {
if (proxy != NULL) {
xmlFree(proxy);
proxy = NULL;
}
#ifdef _WINSOCKAPI_
if (initialized)
WSACleanup();
#endif
initialized = 0;
return;
}
/**
* xmlNanoHTTPScanURL:
* @ctxt: an HTTP context
* @URL: The URL used to initialize the context
*
* (Re)Initialize an HTTP context by parsing the URL and finding
* the protocol host port and path it indicates.
*/
static void
xmlNanoHTTPScanURL(xmlNanoHTTPCtxtPtr ctxt, const char *URL) {
xmlURIPtr uri;
int len;
/*
* Clear any existing data from the context
*/
if (ctxt->protocol != NULL) {
xmlFree(ctxt->protocol);
ctxt->protocol = NULL;
}
if (ctxt->hostname != NULL) {
xmlFree(ctxt->hostname);
ctxt->hostname = NULL;
}
if (ctxt->path != NULL) {
xmlFree(ctxt->path);
ctxt->path = NULL;
}
if (ctxt->query != NULL) {
xmlFree(ctxt->query);
ctxt->query = NULL;
}
if (URL == NULL) return;
uri = xmlParseURIRaw(URL, 1);
if (uri == NULL)
return;
if ((uri->scheme == NULL) || (uri->server == NULL)) {
xmlFreeURI(uri);
return;
}
ctxt->protocol = xmlMemStrdup(uri->scheme);
/* special case of IPv6 addresses, the [] need to be removed */
if ((uri->server != NULL) && (*uri->server == '[')) {
len = strlen(uri->server);
if ((len > 2) && (uri->server[len - 1] == ']')) {
ctxt->hostname = (char *) xmlCharStrndup(uri->server + 1, len -2);
} else
ctxt->hostname = xmlMemStrdup(uri->server);
} else
ctxt->hostname = xmlMemStrdup(uri->server);
if (uri->path != NULL)
ctxt->path = xmlMemStrdup(uri->path);
else
ctxt->path = xmlMemStrdup("/");
if (uri->query != NULL)
ctxt->query = xmlMemStrdup(uri->query);
if (uri->port != 0)
ctxt->port = uri->port;
xmlFreeURI(uri);
}
/**
* xmlNanoHTTPScanProxy:
* @URL: The proxy URL used to initialize the proxy context
*
* (Re)Initialize the HTTP Proxy context by parsing the URL and finding
* the protocol host port it indicates.
* Should be like http://myproxy/ or http://myproxy:3128/
* A NULL URL cleans up proxy information.
*/
void
xmlNanoHTTPScanProxy(const char *URL) {
xmlURIPtr uri;
if (proxy != NULL) {
xmlFree(proxy);
proxy = NULL;
}
proxyPort = 0;
if (URL == NULL) return;
uri = xmlParseURIRaw(URL, 1);
if ((uri == NULL) || (uri->scheme == NULL) ||
(strcmp(uri->scheme, "http")) || (uri->server == NULL)) {
__xmlIOErr(XML_FROM_HTTP, XML_HTTP_URL_SYNTAX, "Syntax Error\n");
if (uri != NULL)
xmlFreeURI(uri);
return;
}
proxy = xmlMemStrdup(uri->server);
if (uri->port != 0)
proxyPort = uri->port;
xmlFreeURI(uri);
}
/**
* xmlNanoHTTPNewCtxt:
* @URL: The URL used to initialize the context
*
* Allocate and initialize a new HTTP context.
*
* Returns an HTTP context or NULL in case of error.
*/
static xmlNanoHTTPCtxtPtr
xmlNanoHTTPNewCtxt(const char *URL) {
xmlNanoHTTPCtxtPtr ret;
ret = (xmlNanoHTTPCtxtPtr) xmlMalloc(sizeof(xmlNanoHTTPCtxt));
if (ret == NULL) {
xmlHTTPErrMemory();
return(NULL);
}
memset(ret, 0, sizeof(xmlNanoHTTPCtxt));
ret->port = 80;
ret->returnValue = 0;
ret->fd = INVALID_SOCKET;
ret->ContentLength = -1;
xmlNanoHTTPScanURL(ret, URL);
return(ret);
}
/**
* xmlNanoHTTPFreeCtxt:
* @ctxt: an HTTP context
*
* Frees the context after closing the connection.
*/
static void
xmlNanoHTTPFreeCtxt(xmlNanoHTTPCtxtPtr ctxt) {
if (ctxt == NULL) return;
if (ctxt->hostname != NULL) xmlFree(ctxt->hostname);
if (ctxt->protocol != NULL) xmlFree(ctxt->protocol);
if (ctxt->path != NULL) xmlFree(ctxt->path);
if (ctxt->query != NULL) xmlFree(ctxt->query);
if (ctxt->out != NULL) xmlFree(ctxt->out);
if (ctxt->in != NULL) xmlFree(ctxt->in);
if (ctxt->contentType != NULL) xmlFree(ctxt->contentType);
if (ctxt->encoding != NULL) xmlFree(ctxt->encoding);
if (ctxt->mimeType != NULL) xmlFree(ctxt->mimeType);
if (ctxt->location != NULL) xmlFree(ctxt->location);
if (ctxt->authHeader != NULL) xmlFree(ctxt->authHeader);
#ifdef LIBXML_ZLIB_ENABLED
if (ctxt->strm != NULL) {
inflateEnd(ctxt->strm);
xmlFree(ctxt->strm);
}
#endif
ctxt->state = XML_NANO_HTTP_NONE;
if (ctxt->fd != INVALID_SOCKET) closesocket(ctxt->fd);
ctxt->fd = INVALID_SOCKET;
xmlFree(ctxt);
}
/**
* xmlNanoHTTPSend:
* @ctxt: an HTTP context
*
* Send the input needed to initiate the processing on the server side
* Returns number of bytes sent or -1 on error.
*/
static int
xmlNanoHTTPSend(xmlNanoHTTPCtxtPtr ctxt, const char *xmt_ptr, int outlen)
{
int total_sent = 0;
#ifdef HAVE_POLL_H
struct pollfd p;
#else
struct timeval tv;
fd_set wfd;
#endif
if ((ctxt->state & XML_NANO_HTTP_WRITE) && (xmt_ptr != NULL)) {
while (total_sent < outlen) {
int nsent = send(ctxt->fd, SEND_ARG2_CAST (xmt_ptr + total_sent),
outlen - total_sent, 0);
if (nsent > 0)
total_sent += nsent;
else if ((nsent == -1) &&
#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
(socket_errno() != EAGAIN) &&
#endif
(socket_errno() != EWOULDBLOCK)) {
__xmlIOErr(XML_FROM_HTTP, 0, "send failed\n");
if (total_sent == 0)
total_sent = -1;
break;
} else {
/*
* No data sent
* Since non-blocking sockets are used, wait for
* socket to be writable or default timeout prior
* to retrying.
*/
#ifndef HAVE_POLL_H
#ifndef _WINSOCKAPI_
if (ctxt->fd > FD_SETSIZE)
return -1;
#endif
tv.tv_sec = timeout;
tv.tv_usec = 0;
FD_ZERO(&wfd);
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4018)
#endif
FD_SET(ctxt->fd, &wfd);
#ifdef _MSC_VER
#pragma warning(pop)
#endif
(void) select(ctxt->fd + 1, NULL, &wfd, NULL, &tv);
#else
p.fd = ctxt->fd;
p.events = POLLOUT;
(void) poll(&p, 1, timeout * 1000);
#endif /* !HAVE_POLL_H */
}
}
}
return total_sent;
}
/**
* xmlNanoHTTPRecv:
* @ctxt: an HTTP context
*
* Read information coming from the HTTP connection.
* This is a blocking call (but it blocks in select(), not read()).
*
* Returns the number of byte read or -1 in case of error.
*/
static int
xmlNanoHTTPRecv(xmlNanoHTTPCtxtPtr ctxt)
{
#ifdef HAVE_POLL_H
struct pollfd p;
#else
fd_set rfd;
struct timeval tv;
#endif
while (ctxt->state & XML_NANO_HTTP_READ) {
if (ctxt->in == NULL) {
ctxt->in = (char *) xmlMallocAtomic(65000);
if (ctxt->in == NULL) {
xmlHTTPErrMemory();
ctxt->last = -1;
return (-1);
}
ctxt->inlen = 65000;
ctxt->inptr = ctxt->content = ctxt->inrptr = ctxt->in;
}
if (ctxt->inrptr > ctxt->in + XML_NANO_HTTP_CHUNK) {
int delta = ctxt->inrptr - ctxt->in;
int len = ctxt->inptr - ctxt->inrptr;
memmove(ctxt->in, ctxt->inrptr, len);
ctxt->inrptr -= delta;
ctxt->content -= delta;
ctxt->inptr -= delta;
}
if ((ctxt->in + ctxt->inlen) < (ctxt->inptr + XML_NANO_HTTP_CHUNK)) {
int d_inptr = ctxt->inptr - ctxt->in;
int d_content = ctxt->content - ctxt->in;
int d_inrptr = ctxt->inrptr - ctxt->in;
char *tmp_ptr = ctxt->in;
ctxt->inlen *= 2;
ctxt->in = (char *) xmlRealloc(tmp_ptr, ctxt->inlen);
if (ctxt->in == NULL) {
xmlHTTPErrMemory();
xmlFree(tmp_ptr);
ctxt->last = -1;
return (-1);
}
ctxt->inptr = ctxt->in + d_inptr;
ctxt->content = ctxt->in + d_content;
ctxt->inrptr = ctxt->in + d_inrptr;
}
ctxt->last = recv(ctxt->fd, ctxt->inptr, XML_NANO_HTTP_CHUNK, 0);
if (ctxt->last > 0) {
ctxt->inptr += ctxt->last;
return (ctxt->last);
}
if (ctxt->last == 0) {
return (0);
}
if (ctxt->last == -1) {
switch (socket_errno()) {
case EINPROGRESS:
case EWOULDBLOCK:
#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
case EAGAIN:
#endif
break;
case ECONNRESET:
case ESHUTDOWN:
return (0);
default:
__xmlIOErr(XML_FROM_HTTP, 0, "recv failed\n");
return (-1);
}
}
#ifdef HAVE_POLL_H
p.fd = ctxt->fd;
p.events = POLLIN;
if ((poll(&p, 1, timeout * 1000) < 1)
#if defined(EINTR)
&& (errno != EINTR)
#endif
)
return (0);
#else /* !HAVE_POLL_H */
#ifndef _WINSOCKAPI_
if (ctxt->fd > FD_SETSIZE)
return 0;
#endif
tv.tv_sec = timeout;
tv.tv_usec = 0;
FD_ZERO(&rfd);
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4018)
#endif
FD_SET(ctxt->fd, &rfd);
#ifdef _MSC_VER
#pragma warning(pop)
#endif
if ((select(ctxt->fd + 1, &rfd, NULL, NULL, &tv) < 1)
#if defined(EINTR)
&& (socket_errno() != EINTR)
#endif
)
return (0);
#endif /* !HAVE_POLL_H */
}
return (0);
}
/**
* xmlNanoHTTPReadLine:
* @ctxt: an HTTP context
*
* Read one line in the HTTP server output, usually for extracting
* the HTTP protocol information from the answer header.
*
* Returns a newly allocated string with a copy of the line, or NULL
* which indicate the end of the input.
*/
static char *
xmlNanoHTTPReadLine(xmlNanoHTTPCtxtPtr ctxt) {
char buf[4096];
char *bp = buf;
int rc;
while (bp - buf < 4095) {
if (ctxt->inrptr == ctxt->inptr) {
if ( (rc = xmlNanoHTTPRecv(ctxt)) == 0) {
if (bp == buf)
return(NULL);
else
*bp = 0;
return(xmlMemStrdup(buf));
}
else if ( rc == -1 ) {
return ( NULL );
}
}
*bp = *ctxt->inrptr++;
if (*bp == '\n') {
*bp = 0;
return(xmlMemStrdup(buf));
}
if (*bp != '\r')
bp++;
}
buf[4095] = 0;
return(xmlMemStrdup(buf));
}
/**
* xmlNanoHTTPScanAnswer:
* @ctxt: an HTTP context
* @line: an HTTP header line
*
* Try to extract useful information from the server answer.
* We currently parse and process:
* - The HTTP revision/ return code
* - The Content-Type, Mime-Type and charset used
* - The Location for redirect processing.
*
* Returns -1 in case of failure, the file descriptor number otherwise
*/
static void
xmlNanoHTTPScanAnswer(xmlNanoHTTPCtxtPtr ctxt, const char *line) {
const char *cur = line;
if (line == NULL) return;
if (!strncmp(line, "HTTP/", 5)) {
int version = 0;
int ret = 0;
cur += 5;
while ((*cur >= '0') && (*cur <= '9')) {
version *= 10;
version += *cur - '0';
cur++;
}
if (*cur == '.') {
cur++;
if ((*cur >= '0') && (*cur <= '9')) {
version *= 10;
version += *cur - '0';
cur++;
}
while ((*cur >= '0') && (*cur <= '9'))
cur++;
} else
version *= 10;
if ((*cur != ' ') && (*cur != '\t')) return;
while ((*cur == ' ') || (*cur == '\t')) cur++;
if ((*cur < '0') || (*cur > '9')) return;
while ((*cur >= '0') && (*cur <= '9')) {
ret *= 10;
ret += *cur - '0';
cur++;
}
if ((*cur != 0) && (*cur != ' ') && (*cur != '\t')) return;
ctxt->returnValue = ret;
ctxt->version = version;
} else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Content-Type:", 13)) {
const xmlChar *charset, *last, *mime;
cur += 13;
while ((*cur == ' ') || (*cur == '\t')) cur++;
if (ctxt->contentType != NULL)
xmlFree(ctxt->contentType);
ctxt->contentType = xmlMemStrdup(cur);
mime = (const xmlChar *) cur;
last = mime;
while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
(*last != ';') && (*last != ','))
last++;
if (ctxt->mimeType != NULL)
xmlFree(ctxt->mimeType);
ctxt->mimeType = (char *) xmlStrndup(mime, last - mime);
charset = xmlStrstr(BAD_CAST ctxt->contentType, BAD_CAST "charset=");
if (charset != NULL) {
charset += 8;
last = charset;
while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
(*last != ';') && (*last != ','))
last++;
if (ctxt->encoding != NULL)
xmlFree(ctxt->encoding);
ctxt->encoding = (char *) xmlStrndup(charset, last - charset);
}
} else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"ContentType:", 12)) {
const xmlChar *charset, *last, *mime;
cur += 12;
if (ctxt->contentType != NULL) return;
while ((*cur == ' ') || (*cur == '\t')) cur++;
ctxt->contentType = xmlMemStrdup(cur);
mime = (const xmlChar *) cur;
last = mime;
while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
(*last != ';') && (*last != ','))
last++;
if (ctxt->mimeType != NULL)
xmlFree(ctxt->mimeType);
ctxt->mimeType = (char *) xmlStrndup(mime, last - mime);
charset = xmlStrstr(BAD_CAST ctxt->contentType, BAD_CAST "charset=");
if (charset != NULL) {
charset += 8;
last = charset;
while ((*last != 0) && (*last != ' ') && (*last != '\t') &&
(*last != ';') && (*last != ','))
last++;
if (ctxt->encoding != NULL)
xmlFree(ctxt->encoding);
ctxt->encoding = (char *) xmlStrndup(charset, last - charset);
}
} else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Location:", 9)) {
cur += 9;
while ((*cur == ' ') || (*cur == '\t')) cur++;
if (ctxt->location != NULL)
xmlFree(ctxt->location);
if (*cur == '/') {
xmlChar *tmp_http = xmlStrdup(BAD_CAST "http://");
xmlChar *tmp_loc =
xmlStrcat(tmp_http, (const xmlChar *) ctxt->hostname);
ctxt->location =
(char *) xmlStrcat (tmp_loc, (const xmlChar *) cur);
} else {
ctxt->location = xmlMemStrdup(cur);
}
} else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"WWW-Authenticate:", 17)) {
cur += 17;
while ((*cur == ' ') || (*cur == '\t')) cur++;
if (ctxt->authHeader != NULL)
xmlFree(ctxt->authHeader);
ctxt->authHeader = xmlMemStrdup(cur);
} else if (!xmlStrncasecmp(BAD_CAST line, BAD_CAST"Proxy-Authenticate:", 19)) {
cur += 19;
while ((*cur == ' ') || (*cur == '\t')) cur++;
if (ctxt->authHeader != NULL)
xmlFree(ctxt->authHeader);
ctxt->authHeader = xmlMemStrdup(cur);
#ifdef LIBXML_ZLIB_ENABLED
} else if ( !xmlStrncasecmp( BAD_CAST line, BAD_CAST"Content-Encoding:", 17) ) {
cur += 17;
while ((*cur == ' ') || (*cur == '\t')) cur++;
if ( !xmlStrncasecmp( BAD_CAST cur, BAD_CAST"gzip", 4) ) {
ctxt->usesGzip = 1;
ctxt->strm = xmlMalloc(sizeof(z_stream));
if (ctxt->strm != NULL) {
ctxt->strm->zalloc = Z_NULL;
ctxt->strm->zfree = Z_NULL;
ctxt->strm->opaque = Z_NULL;
ctxt->strm->avail_in = 0;
ctxt->strm->next_in = Z_NULL;
inflateInit2( ctxt->strm, 31 );
}
}
#endif
} else if ( !xmlStrncasecmp( BAD_CAST line, BAD_CAST"Content-Length:", 15) ) {
cur += 15;
ctxt->ContentLength = strtol( cur, NULL, 10 );
}
}
/**
* xmlNanoHTTPConnectAttempt:
* @addr: a socket address structure
*
* Attempt a connection to the given IP:port endpoint. It forces
* non-blocking semantic on the socket, and allow 60 seconds for
* the host to answer.
*
* Returns -1 in case of failure, the file descriptor number otherwise
*/
static SOCKET
xmlNanoHTTPConnectAttempt(struct sockaddr *addr)
{
#ifndef HAVE_POLL_H
fd_set wfd;
#ifdef _WINSOCKAPI_
fd_set xfd;
#endif
struct timeval tv;
#else /* !HAVE_POLL_H */
struct pollfd p;
#endif /* !HAVE_POLL_H */
int status;
int addrlen;
SOCKET s;
#ifdef SUPPORT_IP6
if (addr->sa_family == AF_INET6) {
s = socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP);
addrlen = sizeof(struct sockaddr_in6);
} else
#endif
{
s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
addrlen = sizeof(struct sockaddr_in);
}
if (s == INVALID_SOCKET) {
__xmlIOErr(XML_FROM_HTTP, 0, "socket failed\n");
return INVALID_SOCKET;
}
#ifdef _WINSOCKAPI_
{
u_long one = 1;
status = ioctlsocket(s, FIONBIO, &one) == SOCKET_ERROR ? -1 : 0;
}
#else /* _WINSOCKAPI_ */
#if defined(VMS)
{
int enable = 1;
status = ioctl(s, FIONBIO, &enable);
}
#else /* VMS */
if ((status = fcntl(s, F_GETFL, 0)) != -1) {
#ifdef O_NONBLOCK
status |= O_NONBLOCK;
#else /* O_NONBLOCK */
#ifdef F_NDELAY
status |= F_NDELAY;
#endif /* F_NDELAY */
#endif /* !O_NONBLOCK */
status = fcntl(s, F_SETFL, status);
}
if (status < 0) {
__xmlIOErr(XML_FROM_HTTP, 0, "error setting non-blocking IO\n");
closesocket(s);
return INVALID_SOCKET;
}
#endif /* !VMS */
#endif /* !_WINSOCKAPI_ */
if (connect(s, addr, addrlen) == -1) {
switch (socket_errno()) {
case EINPROGRESS:
case EWOULDBLOCK:
break;
default:
__xmlIOErr(XML_FROM_HTTP, 0,
"error connecting to HTTP server");
closesocket(s);
return INVALID_SOCKET;
}
}
#ifndef HAVE_POLL_H
tv.tv_sec = timeout;
tv.tv_usec = 0;
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4018)
#endif
#ifndef _WINSOCKAPI_
if (s > FD_SETSIZE)
return INVALID_SOCKET;
#endif
FD_ZERO(&wfd);
FD_SET(s, &wfd);
#ifdef _WINSOCKAPI_
FD_ZERO(&xfd);
FD_SET(s, &xfd);
switch (select(s + 1, NULL, &wfd, &xfd, &tv))
#else
switch (select(s + 1, NULL, &wfd, NULL, &tv))
#endif
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#else /* !HAVE_POLL_H */
p.fd = s;
p.events = POLLOUT;
switch (poll(&p, 1, timeout * 1000))
#endif /* !HAVE_POLL_H */
{
case 0:
/* Time out */
__xmlIOErr(XML_FROM_HTTP, 0, "Connect attempt timed out");
closesocket(s);
return INVALID_SOCKET;
case -1:
/* Ermm.. ?? */
__xmlIOErr(XML_FROM_HTTP, 0, "Connect failed");
closesocket(s);
return INVALID_SOCKET;
}
#ifndef HAVE_POLL_H
if (FD_ISSET(s, &wfd)
#ifdef _WINSOCKAPI_
|| FD_ISSET(s, &xfd)
#endif
)
#else /* !HAVE_POLL_H */
if (p.revents == POLLOUT)
#endif /* !HAVE_POLL_H */
{
XML_SOCKLEN_T len;
len = sizeof(status);
#ifdef SO_ERROR
if (getsockopt(s, SOL_SOCKET, SO_ERROR, (char *) &status, &len) <
0) {
/* Solaris error code */
__xmlIOErr(XML_FROM_HTTP, 0, "getsockopt failed\n");
closesocket(s);
return INVALID_SOCKET;
}
#endif
if (status) {
__xmlIOErr(XML_FROM_HTTP, 0,
"Error connecting to remote host");
closesocket(s);
errno = status;
return INVALID_SOCKET;
}
} else {
/* pbm */
__xmlIOErr(XML_FROM_HTTP, 0, "select failed\n");
closesocket(s);
return INVALID_SOCKET;
}
return (s);
}
/**
* xmlNanoHTTPConnectHost:
* @host: the host name
* @port: the port number
*
* Attempt a connection to the given host:port endpoint. It tries
* the multiple IP provided by the DNS if available.
*
* Returns -1 in case of failure, the file descriptor number otherwise
*/
static SOCKET
xmlNanoHTTPConnectHost(const char *host, int port)
{
struct sockaddr *addr = NULL;
struct sockaddr_in sockin;
#ifdef SUPPORT_IP6
struct sockaddr_in6 sockin6;
#endif