forgot them in the 1.7.0 commit, oops, Daniel.
diff --git a/nanohttp.c b/nanohttp.c
new file mode 100644
index 0000000..26dcf3a
--- /dev/null
+++ b/nanohttp.c
@@ -0,0 +1,1011 @@
+/*
+ * 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.
+ *
+ * Daniel.Veillard@w3.org
+ */
+
+/* TODO add compression support, Send the Accept- , and decompress on the
+ fly with ZLIB if found at compile-time */
+
+#ifndef WIN32
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <string.h>
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.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_ERRNO_H
+#include <errno.h>
+#endif
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+
+#include "xmlmemory.h"
+
+#ifdef STANDALONE
+#define DEBUG_HTTP
+#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 */
+ int 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 */
+ char *contentType; /* the MIME type for the input */
+ char *location; /* the new URL in case of redirect */
+} xmlNanoHTTPCtxt, *xmlNanoHTTPCtxtPtr;
+
+/**
+ * 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) {
+ const char *cur = URL;
+ char buf[4096];
+ int index = 0;
+ int port = 0;
+
+ 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;
+ }
+ buf[index] = 0;
+ while (*cur != 0) {
+ if ((cur[0] == ':') && (cur[1] == '/') && (cur[2] == '/')) {
+ buf[index] = 0;
+ ctxt->protocol = xmlMemStrdup(buf);
+ index = 0;
+ cur += 3;
+ break;
+ }
+ buf[index++] = *cur++;
+ }
+ if (*cur == 0) return;
+
+ buf[index] = 0;
+ while (1) {
+ if (cur[0] == ':') {
+ buf[index] = 0;
+ ctxt->hostname = xmlMemStrdup(buf);
+ index = 0;
+ cur += 1;
+ while ((*cur >= '0') && (*cur <= '9')) {
+ port *= 10;
+ port += *cur - '0';
+ cur++;
+ }
+ if (port != 0) ctxt->port = port;
+ while ((cur[0] != '/') && (*cur != 0))
+ cur++;
+ break;
+ }
+ if ((*cur == '/') || (*cur == 0)) {
+ buf[index] = 0;
+ ctxt->hostname = xmlMemStrdup(buf);
+ index = 0;
+ break;
+ }
+ buf[index++] = *cur++;
+ }
+ if (*cur == 0)
+ ctxt->path = xmlMemStrdup("/");
+ else {
+ buf[index] = 0;
+ while (*cur != 0) {
+ if ((cur[0] == '#') || (cur[0] == '?'))
+ break;
+ buf[index++] = *cur++;
+ }
+ buf[index] = 0;
+ ctxt->path = xmlMemStrdup(buf);
+ }
+}
+
+/**
+ * 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) return(NULL);
+
+ memset(ret, 0, sizeof(xmlNanoHTTPCtxt));
+ ret->port = 80;
+ ret->returnValue = 0;
+
+ 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->out != NULL) xmlFree(ctxt->out);
+ if (ctxt->in != NULL) xmlFree(ctxt->in);
+ if (ctxt->contentType != NULL) xmlFree(ctxt->contentType);
+ if (ctxt->location != NULL) xmlFree(ctxt->location);
+ ctxt->state = XML_NANO_HTTP_NONE;
+ if (ctxt->fd >= 0) close(ctxt->fd);
+ ctxt->fd = -1;
+ xmlFree(ctxt);
+}
+
+/**
+ * xmlNanoHTTPSend:
+ * @ctxt: an HTTP context
+ *
+ * Send the input needed to initiate the processing on the server side
+ */
+
+static void
+xmlNanoHTTPSend(xmlNanoHTTPCtxtPtr ctxt) {
+ if (ctxt->state & XML_NANO_HTTP_WRITE)
+ ctxt->last = write(ctxt->fd, ctxt->outptr, strlen(ctxt->outptr));
+}
+
+/**
+ * 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) {
+ fd_set rfd;
+ struct timeval tv;
+
+
+ while (ctxt->state & XML_NANO_HTTP_READ) {
+ if (ctxt->in == NULL) {
+ ctxt->in = (char *) xmlMalloc(65000 * sizeof(char));
+ if (ctxt->in == NULL) {
+ 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;
+
+ ctxt->inlen *= 2;
+ ctxt->in = (char *) xmlRealloc(ctxt->in, ctxt->inlen);
+ if (ctxt->in == NULL) {
+ 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 = read(ctxt->fd, ctxt->inptr, XML_NANO_HTTP_CHUNK);
+ if (ctxt->last > 0) {
+ ctxt->inptr += ctxt->last;
+ return(ctxt->last);
+ }
+ if (ctxt->last == 0) {
+ return(0);
+ }
+#ifdef EWOULDBLOCK
+ if ((ctxt->last == -1) && (errno != EWOULDBLOCK)) {
+ return(0);
+ }
+#endif
+ tv.tv_sec=10;
+ tv.tv_usec=0;
+ FD_ZERO(&rfd);
+ FD_SET(ctxt->fd, &rfd);
+
+ if(select(ctxt->fd+1, &rfd, NULL, NULL, &tv)<1)
+ return(0);
+ }
+ return(0);
+}
+
+/**
+ * xmlNanoHTTPReadLine:
+ * @ctxt: an HTTP context
+ *
+ * Read one line in the HTTP server output, usually for extracting
+ * the HTTP protocol informations 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;
+
+ while(bp - buf < 4095) {
+ if(ctxt->inrptr == ctxt->inptr) {
+ if (xmlNanoHTTPRecv(ctxt) == 0) {
+ if (bp == buf)
+ return(NULL);
+ else
+ *bp = 0;
+ return(xmlMemStrdup(buf));
+ }
+ }
+ *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 informations from the server answer.
+ * We currently parse and process:
+ * - The HTTP revision/ return code
+ * - The Content-Type
+ * - The Location for redirrect 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;
+ } else if (!strncmp(line, "Content-Type:", 13)) {
+ cur += 13;
+ while ((*cur == ' ') || (*cur == '\t')) cur++;
+ if (ctxt->contentType != NULL)
+ xmlFree(ctxt->contentType);
+ ctxt->contentType = xmlMemStrdup(cur);
+ } else if (!strncmp(line, "ContentType:", 12)) {
+ cur += 12;
+ if (ctxt->contentType != NULL) return;
+ while ((*cur == ' ') || (*cur == '\t')) cur++;
+ ctxt->contentType = xmlMemStrdup(cur);
+ } else if (!strncmp(line, "content-type:", 13)) {
+ cur += 13;
+ if (ctxt->contentType != NULL) return;
+ while ((*cur == ' ') || (*cur == '\t')) cur++;
+ ctxt->contentType = xmlMemStrdup(cur);
+ } else if (!strncmp(line, "contenttype:", 12)) {
+ cur += 12;
+ if (ctxt->contentType != NULL) return;
+ while ((*cur == ' ') || (*cur == '\t')) cur++;
+ ctxt->contentType = xmlMemStrdup(cur);
+ } else if (!strncmp(line, "Location:", 9)) {
+ cur += 9;
+ while ((*cur == ' ') || (*cur == '\t')) cur++;
+ if (ctxt->location != NULL)
+ xmlFree(ctxt->location);
+ ctxt->location = xmlMemStrdup(cur);
+ } else if (!strncmp(line, "location:", 9)) {
+ cur += 9;
+ if (ctxt->location != NULL) return;
+ while ((*cur == ' ') || (*cur == '\t')) cur++;
+ ctxt->location = xmlMemStrdup(cur);
+ }
+}
+
+/**
+ * xmlNanoHTTPConnectAttempt:
+ * @ia: an internet adress structure
+ * @port: the port number
+ *
+ * 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 int
+xmlNanoHTTPConnectAttempt(struct in_addr ia, int port)
+{
+ int s=socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
+ struct sockaddr_in sin;
+ fd_set wfd;
+ struct timeval tv;
+ int status;
+
+ if(s==-1) {
+#ifdef DEBUG_HTTP
+ perror("socket");
+#endif
+ return(-1);
+ }
+
+#ifdef _WINSOCKAPI_
+ {
+ long levents = FD_READ | FD_WRITE | FD_ACCEPT |
+ FD_CONNECT | FD_CLOSE ;
+ int rv = 0 ;
+ 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) {
+#ifdef DEBUG_HTTP
+ perror("nonblocking");
+#endif
+ close(s);
+ return(-1);
+ }
+#endif /* !VMS */
+#endif /* !_WINSOCKAPI_ */
+
+
+ sin.sin_family = AF_INET;
+ sin.sin_addr = ia;
+ sin.sin_port = htons(port);
+
+ if((connect(s, (struct sockaddr *)&sin, sizeof(sin))==-1) &&
+ (errno != EINPROGRESS)) {
+ perror("connect");
+ close(s);
+ return(-1);
+ }
+
+ tv.tv_sec = 60; /* We use 60 second timeouts for now */
+ tv.tv_usec = 0;
+
+ FD_ZERO(&wfd);
+ FD_SET(s, &wfd);
+
+ switch(select(s+1, NULL, &wfd, NULL, &tv))
+ {
+ case 0:
+ /* Time out */
+ close(s);
+ return(-1);
+ case -1:
+ /* Ermm.. ?? */
+#ifdef DEBUG_HTTP
+ perror("select");
+#endif
+ close(s);
+ return(-1);
+ }
+
+ 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 int
+xmlNanoHTTPConnectHost(const char *host, int port)
+{
+ struct hostent *h;
+ int i;
+ int s;
+
+ h=gethostbyname(host);
+ if(h==NULL)
+ {
+#ifdef DEBUG_HTTP
+ fprintf(stderr,"unable to resolve '%s'.\n", host);
+#endif
+ return(-1);
+ }
+
+ for(i=0; h->h_addr_list[i]; i++)
+ {
+ struct in_addr ia;
+ memcpy(&ia, h->h_addr_list[i],4);
+ s = xmlNanoHTTPConnectAttempt(ia, port);
+ if(s != -1)
+ return(s);
+ }
+
+#ifdef DEBUG_HTTP
+ fprintf(stderr, "unable to connect to '%s'.\n", host);
+#endif
+ return(-1);
+}
+
+
+/**
+ * xmlNanoHTTPOpen:
+ * @URL: The URL to load
+ * @contentType: if available the Content-Type information will be
+ * returned at that location
+ *
+ * This function try to open a connection to the indicated resource
+ * via HTTP GET.
+ *
+ * Returns NULL in case of failure, otherwise a request handler.
+ * The contentType, if provided must be freed by the caller
+ */
+
+void *
+xmlNanoHTTPOpen(const char *URL, char **contentType) {
+ xmlNanoHTTPCtxtPtr ctxt;
+ char buf[4096];
+ int ret;
+ char *p;
+ int head;
+ int nbRedirects = 0;
+ char *redirURL = NULL;
+
+ if (contentType != NULL) *contentType = NULL;
+
+retry:
+ if (redirURL == NULL)
+ ctxt = xmlNanoHTTPNewCtxt(URL);
+ else {
+ ctxt = xmlNanoHTTPNewCtxt(redirURL);
+ xmlFree(redirURL);
+ redirURL = NULL;
+ }
+
+ if ((ctxt->protocol == NULL) || (strcmp(ctxt->protocol, "http"))) {
+ xmlNanoHTTPFreeCtxt(ctxt);
+ if (redirURL != NULL) xmlFree(redirURL);
+ return(NULL);
+ }
+ if (ctxt->hostname == NULL) {
+ xmlNanoHTTPFreeCtxt(ctxt);
+ return(NULL);
+ }
+ ret = xmlNanoHTTPConnectHost(ctxt->hostname, ctxt->port);
+ if (ret < 0) {
+ xmlNanoHTTPFreeCtxt(ctxt);
+ return(NULL);
+ }
+ ctxt->fd = ret;
+ snprintf(buf, sizeof(buf),"GET %s HTTP/1.0\r\nHost: %s\r\n\r\n",
+ ctxt->path, ctxt->hostname);
+#ifdef DEBUG_HTTP
+ printf("-> GET %s HTTP/1.0\n-> Host: %s\n\n",
+ ctxt->path, ctxt->hostname);
+#endif
+ ctxt->outptr = ctxt->out = xmlMemStrdup(buf);
+ ctxt->state = XML_NANO_HTTP_WRITE;
+ xmlNanoHTTPSend(ctxt);
+ ctxt->state = XML_NANO_HTTP_READ;
+ head = 1;
+
+ while ((p = xmlNanoHTTPReadLine(ctxt)) != NULL) {
+ if (head && (*p == 0)) {
+ head = 0;
+ ctxt->content = ctxt->inrptr;
+ break;
+ }
+ xmlNanoHTTPScanAnswer(ctxt, p);
+
+#ifdef DEBUG_HTTP
+ if (p != NULL) printf("<- %s\n", p);
+#endif
+ if (p != NULL) xmlFree(p);
+ }
+
+ if ((ctxt->location != NULL) && (ctxt->returnValue >= 300) &&
+ (ctxt->returnValue < 400)) {
+#ifdef DEBUG_HTTP
+ printf("\nRedirect to: %s\n", ctxt->location);
+#endif
+ while (xmlNanoHTTPRecv(ctxt)) ;
+ if (nbRedirects < XML_NANO_HTTP_MAX_REDIR) {
+ nbRedirects++;
+ redirURL = xmlMemStrdup(ctxt->location);
+ xmlNanoHTTPFreeCtxt(ctxt);
+ goto retry;
+ }
+ xmlNanoHTTPFreeCtxt(ctxt);
+#ifdef DEBUG_HTTP
+ printf("Too many redirrects, aborting ...\n");
+#endif
+ return(NULL);
+
+ }
+
+ if ((contentType != NULL) && (ctxt->contentType != NULL))
+ *contentType = xmlMemStrdup(ctxt->contentType);
+
+#ifdef DEBUG_HTTP
+ if (ctxt->contentType != NULL)
+ printf("\nCode %d, content-type '%s'\n\n",
+ ctxt->returnValue, ctxt->contentType);
+ else
+ printf("\nCode %d, no content-type\n\n",
+ ctxt->returnValue);
+#endif
+
+ return((void *) ctxt);
+}
+
+/**
+ * xmlNanoHTTPRead:
+ * @ctx: the HTTP context
+ * @dest: a buffer
+ * @len: the buffer length
+ *
+ * This function tries to read @len bytes from the existing HTTP connection
+ * and saves them in @dest. This is a blocking call.
+ *
+ * Returns the number of byte read. 0 is an indication of an end of connection.
+ * -1 indicates a parameter error.
+ */
+int
+xmlNanoHTTPRead(void *ctx, void *dest, int len) {
+ xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
+
+ if (ctx == NULL) return(-1);
+ if (dest == NULL) return(-1);
+ if (len <= 0) return(0);
+
+ while (ctxt->inptr - ctxt->inrptr < len) {
+ if (xmlNanoHTTPRecv(ctxt) == 0) break;
+ }
+ if (ctxt->inptr - ctxt->inrptr < len)
+ len = ctxt->inptr - ctxt->inrptr;
+ memcpy(dest, ctxt->inrptr, len);
+ ctxt->inrptr += len;
+ return(len);
+}
+
+/**
+ * xmlNanoHTTPClose:
+ * @ctx: the HTTP context
+ *
+ * This function closes an HTTP context, it ends up the connection and
+ * free all data related to it.
+ */
+void
+xmlNanoHTTPClose(void *ctx) {
+ xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
+
+ if (ctx == NULL) return;
+
+ xmlNanoHTTPFreeCtxt(ctxt);
+}
+
+/**
+ * xmlNanoHTTPMethod:
+ * @URL: The URL to load
+ * @method: the HTTP method to use
+ * @input: the input string if any
+ * @contentType: the Content-Type information IN and OUT
+ * @headers: the extra headers
+ *
+ * This function try to open a connection to the indicated resource
+ * via HTTP using the given @method, adding the given extra headers
+ * and the input buffer for the request content.
+ *
+ * Returns NULL in case of failure, otherwise a request handler.
+ * The contentType, if provided must be freed by the caller
+ */
+
+#ifndef DEBUG_HTTP
+#define DEBUG_HTTP
+#endif
+void *
+xmlNanoHTTPMethod(const char *URL, const char *method, const char *input,
+ char **contentType, const char *headers) {
+ xmlNanoHTTPCtxtPtr ctxt;
+ char buf[20000];
+ int ret;
+ char *p;
+ int head;
+ int nbRedirects = 0;
+ char *redirURL = NULL;
+
+ if (URL == NULL) return(NULL);
+ if (method == NULL) method = "GET";
+ if (contentType != NULL) *contentType = NULL;
+
+retry:
+ if (redirURL == NULL)
+ ctxt = xmlNanoHTTPNewCtxt(URL);
+ else {
+ ctxt = xmlNanoHTTPNewCtxt(redirURL);
+ xmlFree(redirURL);
+ redirURL = NULL;
+ }
+
+ if ((ctxt->protocol == NULL) || (strcmp(ctxt->protocol, "http"))) {
+ xmlNanoHTTPFreeCtxt(ctxt);
+ if (redirURL != NULL) xmlFree(redirURL);
+ return(NULL);
+ }
+ if (ctxt->hostname == NULL) {
+ xmlNanoHTTPFreeCtxt(ctxt);
+ return(NULL);
+ }
+ ret = xmlNanoHTTPConnectHost(ctxt->hostname, ctxt->port);
+ if (ret < 0) {
+ xmlNanoHTTPFreeCtxt(ctxt);
+ return(NULL);
+ }
+ ctxt->fd = ret;
+
+ if (input == NULL) {
+ if (headers == NULL) {
+ if ((contentType == NULL) || (*contentType == NULL)) {
+ snprintf(buf, sizeof(buf),
+ "%s %s HTTP/1.0\r\nHost: %s\r\n\r\n",
+ method, ctxt->path, ctxt->hostname);
+ } else {
+ snprintf(buf, sizeof(buf),
+ "%s %s HTTP/1.0\r\nHost: %s\r\nContent-Type: %s\r\n\r\n",
+ method, ctxt->path, ctxt->hostname, *contentType);
+ }
+ } else {
+ if ((contentType == NULL) || (*contentType == NULL)) {
+ snprintf(buf, sizeof(buf),
+ "%s %s HTTP/1.0\r\nHost: %s\r\n%s\r\n",
+ method, ctxt->path, ctxt->hostname, headers);
+ } else {
+ snprintf(buf, sizeof(buf),
+ "%s %s HTTP/1.0\r\nHost: %s\r\nContent-Type: %s\r\n%s\r\n",
+ method, ctxt->path, ctxt->hostname, *contentType,
+ headers);
+ }
+ }
+ } else {
+ int len = strlen(input);
+ if (headers == NULL) {
+ if ((contentType == NULL) || (*contentType == NULL)) {
+ snprintf(buf, sizeof(buf),
+ "%s %s HTTP/1.0\r\nHost: %s\r\nContent-Length: %d\r\n\r\n%s",
+ method, ctxt->path, ctxt->hostname, len, input);
+ } else {
+ snprintf(buf, sizeof(buf),
+"%s %s HTTP/1.0\r\nHost: %s\r\nContent-Type: %s\r\nContent-Length: %d\r\n\r\n%s",
+ method, ctxt->path, ctxt->hostname, *contentType, len,
+ input);
+ }
+ } else {
+ if ((contentType == NULL) || (*contentType == NULL)) {
+ snprintf(buf, sizeof(buf),
+ "%s %s HTTP/1.0\r\nHost: %s\r\nContent-Length: %d\r\n%s\r\n%s",
+ method, ctxt->path, ctxt->hostname, len,
+ headers, input);
+ } else {
+ snprintf(buf, sizeof(buf),
+"%s %s HTTP/1.0\r\nHost: %s\r\nContent-Type: %s\r\nContent-Length: %d\r\n%s\r\n%s",
+ method, ctxt->path, ctxt->hostname, *contentType,
+ len, headers, input);
+ }
+ }
+ }
+#ifdef DEBUG_HTTP
+ printf("-> %s", buf);
+#endif
+ ctxt->outptr = ctxt->out = xmlMemStrdup(buf);
+ ctxt->state = XML_NANO_HTTP_WRITE;
+ xmlNanoHTTPSend(ctxt);
+ ctxt->state = XML_NANO_HTTP_READ;
+ head = 1;
+
+ while ((p = xmlNanoHTTPReadLine(ctxt)) != NULL) {
+ if (head && (*p == 0)) {
+ head = 0;
+ ctxt->content = ctxt->inrptr;
+ if (p != NULL) xmlFree(p);
+ break;
+ }
+ xmlNanoHTTPScanAnswer(ctxt, p);
+
+#ifdef DEBUG_HTTP
+ if (p != NULL) printf("<- %s\n", p);
+#endif
+ if (p != NULL) xmlFree(p);
+ }
+
+ if ((ctxt->location != NULL) && (ctxt->returnValue >= 300) &&
+ (ctxt->returnValue < 400)) {
+#ifdef DEBUG_HTTP
+ printf("\nRedirect to: %s\n", ctxt->location);
+#endif
+ while (xmlNanoHTTPRecv(ctxt)) ;
+ if (nbRedirects < XML_NANO_HTTP_MAX_REDIR) {
+ nbRedirects++;
+ redirURL = xmlMemStrdup(ctxt->location);
+ xmlNanoHTTPFreeCtxt(ctxt);
+ goto retry;
+ }
+ xmlNanoHTTPFreeCtxt(ctxt);
+#ifdef DEBUG_HTTP
+ printf("Too many redirrects, aborting ...\n");
+#endif
+ return(NULL);
+
+ }
+
+ if ((contentType != NULL) && (ctxt->contentType != NULL))
+ *contentType = xmlMemStrdup(ctxt->contentType);
+ else if (contentType != NULL)
+ *contentType = NULL;
+
+#ifdef DEBUG_HTTP
+ if (ctxt->contentType != NULL)
+ printf("\nCode %d, content-type '%s'\n\n",
+ ctxt->returnValue, ctxt->contentType);
+ else
+ printf("\nCode %d, no content-type\n\n",
+ ctxt->returnValue);
+#endif
+
+ return((void *) ctxt);
+}
+
+/**
+ * xmlNanoHTTPFetch:
+ * @URL: The URL to load
+ * @filename: the filename where the content should be saved
+ * @contentType: if available the Content-Type information will be
+ * returned at that location
+ *
+ * This function try to fetch the indicated resource via HTTP GET
+ * and save it's content in the file.
+ *
+ * Returns -1 in case of failure, 0 incase of success. The contentType,
+ * if provided must be freed by the caller
+ */
+int
+xmlNanoHTTPFetch(const char *URL, const char *filename, char **contentType) {
+ void *ctxt;
+ char buf[4096];
+ int fd;
+ int len;
+
+ ctxt = xmlNanoHTTPOpen(URL, contentType);
+ if (ctxt == NULL) return(-1);
+
+ if (!strcmp(filename, "-"))
+ fd = 0;
+ else {
+ fd = open(filename, O_CREAT | O_WRONLY);
+ if (fd < 0) {
+ xmlNanoHTTPClose(ctxt);
+ if ((contentType != NULL) && (*contentType != NULL)) {
+ xmlFree(*contentType);
+ *contentType = NULL;
+ }
+ return(-1);
+ }
+ }
+
+ while ((len = xmlNanoHTTPRead(ctxt, buf, sizeof(buf))) > 0) {
+ write(fd, buf, len);
+ }
+
+ xmlNanoHTTPClose(ctxt);
+ return(0);
+}
+
+/**
+ * xmlNanoHTTPSave:
+ * @ctx: the HTTP context
+ * @filename: the filename where the content should be saved
+ *
+ * This function saves the output of the HTTP transaction to a file
+ * It closes and free the context at the end
+ *
+ * Returns -1 in case of failure, 0 incase of success.
+ */
+int
+xmlNanoHTTPSave(void *ctxt, const char *filename) {
+ char buf[4096];
+ int fd;
+ int len;
+
+ if (ctxt == NULL) return(-1);
+
+ if (!strcmp(filename, "-"))
+ fd = 0;
+ else {
+ fd = open(filename, O_CREAT | O_WRONLY);
+ if (fd < 0) {
+ xmlNanoHTTPClose(ctxt);
+ return(-1);
+ }
+ }
+
+ while ((len = xmlNanoHTTPRead(ctxt, buf, sizeof(buf))) > 0) {
+ write(fd, buf, len);
+ }
+
+ xmlNanoHTTPClose(ctxt);
+ return(0);
+}
+
+/**
+ * xmlNanoHTTPReturnCode:
+ * @ctx: the HTTP context
+ *
+ * Returns the HTTP return code for the request.
+ */
+int
+xmlNanoHTTPReturnCode(void *ctx) {
+ xmlNanoHTTPCtxtPtr ctxt = (xmlNanoHTTPCtxtPtr) ctx;
+
+ if (ctxt == NULL) return(-1);
+
+ return(ctxt->returnValue);
+}
+
+#ifdef STANDALONE
+int main(int argc, char **argv) {
+ char *contentType = NULL;
+
+ if (argv[1] != NULL) {
+ if (argv[2] != NULL)
+ xmlNanoHTTPFetch(argv[1], argv[2], &contentType);
+ else
+ xmlNanoHTTPFetch(argv[1], "-", &contentType);
+ if (contentType != NULL) xmlFree(contentType);
+ } else {
+ printf("%s: minimal HTTP GET implementation\n", argv[0]);
+ printf("\tusage %s [ URL [ filename ] ]\n", argv[0]);
+ }
+ return(0);
+}
+#endif /* STANDALONE */