diff options
Diffstat (limited to 'uip/apps/webclient')
| -rw-r--r-- | uip/apps/webclient/Makefile.webclient | 1 | ||||
| -rwxr-xr-x | uip/apps/webclient/makestrings | 40 | ||||
| -rw-r--r-- | uip/apps/webclient/webclient-strings | 31 | ||||
| -rw-r--r-- | uip/apps/webclient/webclient-strings.c | 93 | ||||
| -rw-r--r-- | uip/apps/webclient/webclient-strings.h | 31 | ||||
| -rw-r--r-- | uip/apps/webclient/webclient.c | 439 | ||||
| -rw-r--r-- | uip/apps/webclient/webclient.h | 228 |
7 files changed, 863 insertions, 0 deletions
diff --git a/uip/apps/webclient/Makefile.webclient b/uip/apps/webclient/Makefile.webclient new file mode 100644 index 0000000..e6e7f08 --- /dev/null +++ b/uip/apps/webclient/Makefile.webclient @@ -0,0 +1 @@ +APP_SOURCES += webclient-strings.c webclient.c diff --git a/uip/apps/webclient/makestrings b/uip/apps/webclient/makestrings new file mode 100755 index 0000000..6dec075 --- /dev/null +++ b/uip/apps/webclient/makestrings @@ -0,0 +1,40 @@ +#!/usr/bin/perl + + +sub stringify { + my $name = shift(@_); + open(OUTPUTC, "> $name.c"); + open(OUTPUTH, "> $name.h"); + + open(FILE, "$name"); + + while(<FILE>) { + if(/(.+) "(.+)"/) { + $var = $1; + $data = $2; + + $datan = $data; + $datan =~ s/\\r/\r/g; + $datan =~ s/\\n/\n/g; + $datan =~ s/\\01/\01/g; + $datan =~ s/\\0/\0/g; + + printf(OUTPUTC "const char $var\[%d] = \n", length($datan) + 1); + printf(OUTPUTC "/* \"$data\" */\n"); + printf(OUTPUTC "{"); + for($j = 0; $j < length($datan); $j++) { + printf(OUTPUTC "%#02x, ", unpack("C", substr($datan, $j, 1))); + } + printf(OUTPUTC "0 };\n"); + + printf(OUTPUTH "extern const char $var\[%d];\n", length($datan) + 1); + + } + } + close(OUTPUTC); + close(OUTPUTH); +} +stringify("webclient-strings"); + +exit 0; + diff --git a/uip/apps/webclient/webclient-strings b/uip/apps/webclient/webclient-strings new file mode 100644 index 0000000..a331397 --- /dev/null +++ b/uip/apps/webclient/webclient-strings @@ -0,0 +1,31 @@ +http_http "http://" +http_200 "200 " +http_301 "301 " +http_302 "302 " +http_get "GET " +http_10 "HTTP/1.0" +http_11 "HTTP/1.1" +http_content_type "content-type: " +http_texthtml "text/html" +http_location "location: " +http_host "host: " +http_crnl "\r\n" +http_index_html "/index.html" +http_404_html "/404.html" +http_content_type_html "Content-type: text/html\r\n\r\n" +http_content_type_css "Content-type: text/css\r\n\r\n" +http_content_type_text "Content-type: text/text\r\n\r\n" +http_content_type_png "Content-type: image/png\r\n\r\n" +http_content_type_gif "Content-type: image/gif\r\n\r\n" +http_content_type_jpg "Content-type: image/jpeg\r\n\r\n" +http_content_type_binary "Content-type: application/octet-stream\r\n\r\n" +http_html ".html" +http_shtml ".shtml" +http_htm ".htm" +http_css ".css" +http_png ".png" +http_gif ".gif" +http_jpg ".jpg" +http_text ".text" +http_txt ".txt" +http_user_agent_fields "Connection: close\r\nUser-Agent: uIP/1.0 (; http://www.sics.se/~adam/uip/)\r\n\r\n" diff --git a/uip/apps/webclient/webclient-strings.c b/uip/apps/webclient/webclient-strings.c new file mode 100644 index 0000000..9472330 --- /dev/null +++ b/uip/apps/webclient/webclient-strings.c @@ -0,0 +1,93 @@ +const char http_http[8] = +/* "http://" */ +{0x68, 0x74, 0x74, 0x70, 0x3a, 0x2f, 0x2f, 0 }; +const char http_200[5] = +/* "200 " */ +{0x32, 0x30, 0x30, 0x20, 0 }; +const char http_301[5] = +/* "301 " */ +{0x33, 0x30, 0x31, 0x20, 0 }; +const char http_302[5] = +/* "302 " */ +{0x33, 0x30, 0x32, 0x20, 0 }; +const char http_get[5] = +/* "GET " */ +{0x47, 0x45, 0x54, 0x20, 0 }; +const char http_10[9] = +/* "HTTP/1.0" */ +{0x48, 0x54, 0x54, 0x50, 0x2f, 0x31, 0x2e, 0x30, 0 }; +const char http_11[9] = +/* "HTTP/1.1" */ +{0x48, 0x54, 0x54, 0x50, 0x2f, 0x31, 0x2e, 0x31, 0 }; +const char http_content_type[15] = +/* "content-type: " */ +{0x63, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x3a, 0x20, 0 }; +const char http_texthtml[10] = +/* "text/html" */ +{0x74, 0x65, 0x78, 0x74, 0x2f, 0x68, 0x74, 0x6d, 0x6c, 0 }; +const char http_location[11] = +/* "location: " */ +{0x6c, 0x6f, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x3a, 0x20, 0 }; +const char http_host[7] = +/* "host: " */ +{0x68, 0x6f, 0x73, 0x74, 0x3a, 0x20, 0 }; +const char http_crnl[3] = +/* "\r\n" */ +{0xd, 0xa, 0 }; +const char http_index_html[12] = +/* "/index.html" */ +{0x2f, 0x69, 0x6e, 0x64, 0x65, 0x78, 0x2e, 0x68, 0x74, 0x6d, 0x6c, 0 }; +const char http_404_html[10] = +/* "/404.html" */ +{0x2f, 0x34, 0x30, 0x34, 0x2e, 0x68, 0x74, 0x6d, 0x6c, 0 }; +const char http_content_type_html[28] = +/* "Content-type: text/html\r\n\r\n" */ +{0x43, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x3a, 0x20, 0x74, 0x65, 0x78, 0x74, 0x2f, 0x68, 0x74, 0x6d, 0x6c, 0xd, 0xa, 0xd, 0xa, 0 }; +const char http_content_type_css [27] = +/* "Content-type: text/css\r\n\r\n" */ +{0x43, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x3a, 0x20, 0x74, 0x65, 0x78, 0x74, 0x2f, 0x63, 0x73, 0x73, 0xd, 0xa, 0xd, 0xa, 0 }; +const char http_content_type_text[28] = +/* "Content-type: text/text\r\n\r\n" */ +{0x43, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x3a, 0x20, 0x74, 0x65, 0x78, 0x74, 0x2f, 0x74, 0x65, 0x78, 0x74, 0xd, 0xa, 0xd, 0xa, 0 }; +const char http_content_type_png [28] = +/* "Content-type: image/png\r\n\r\n" */ +{0x43, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x3a, 0x20, 0x69, 0x6d, 0x61, 0x67, 0x65, 0x2f, 0x70, 0x6e, 0x67, 0xd, 0xa, 0xd, 0xa, 0 }; +const char http_content_type_gif [28] = +/* "Content-type: image/gif\r\n\r\n" */ +{0x43, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x3a, 0x20, 0x69, 0x6d, 0x61, 0x67, 0x65, 0x2f, 0x67, 0x69, 0x66, 0xd, 0xa, 0xd, 0xa, 0 }; +const char http_content_type_jpg [29] = +/* "Content-type: image/jpeg\r\n\r\n" */ +{0x43, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x3a, 0x20, 0x69, 0x6d, 0x61, 0x67, 0x65, 0x2f, 0x6a, 0x70, 0x65, 0x67, 0xd, 0xa, 0xd, 0xa, 0 }; +const char http_content_type_binary[43] = +/* "Content-type: application/octet-stream\r\n\r\n" */ +{0x43, 0x6f, 0x6e, 0x74, 0x65, 0x6e, 0x74, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x3a, 0x20, 0x61, 0x70, 0x70, 0x6c, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2f, 0x6f, 0x63, 0x74, 0x65, 0x74, 0x2d, 0x73, 0x74, 0x72, 0x65, 0x61, 0x6d, 0xd, 0xa, 0xd, 0xa, 0 }; +const char http_html[6] = +/* ".html" */ +{0x2e, 0x68, 0x74, 0x6d, 0x6c, 0 }; +const char http_shtml[7] = +/* ".shtml" */ +{0x2e, 0x73, 0x68, 0x74, 0x6d, 0x6c, 0 }; +const char http_htm[5] = +/* ".htm" */ +{0x2e, 0x68, 0x74, 0x6d, 0 }; +const char http_css[5] = +/* ".css" */ +{0x2e, 0x63, 0x73, 0x73, 0 }; +const char http_png[5] = +/* ".png" */ +{0x2e, 0x70, 0x6e, 0x67, 0 }; +const char http_gif[5] = +/* ".gif" */ +{0x2e, 0x67, 0x69, 0x66, 0 }; +const char http_jpg[5] = +/* ".jpg" */ +{0x2e, 0x6a, 0x70, 0x67, 0 }; +const char http_text[6] = +/* ".text" */ +{0x2e, 0x74, 0x65, 0x78, 0x74, 0 }; +const char http_txt[5] = +/* ".txt" */ +{0x2e, 0x74, 0x78, 0x74, 0 }; +const char http_user_agent_fields[77] = +/* "Connection: close\r\nUser-Agent: uIP/1.0 (; http://www.sics.se/~adam/uip/)\r\n\r\n" */ +{0x43, 0x6f, 0x6e, 0x6e, 0x65, 0x63, 0x74, 0x69, 0x6f, 0x6e, 0x3a, 0x20, 0x63, 0x6c, 0x6f, 0x73, 0x65, 0xd, 0xa, 0x55, 0x73, 0x65, 0x72, 0x2d, 0x41, 0x67, 0x65, 0x6e, 0x74, 0x3a, 0x20, 0x75, 0x49, 0x50, 0x2f, 0x31, 0x2e, 0x30, 0x20, 0x28, 0x3b, 0x20, 0x68, 0x74, 0x74, 0x70, 0x3a, 0x2f, 0x2f, 0x77, 0x77, 0x77, 0x2e, 0x73, 0x69, 0x63, 0x73, 0x2e, 0x73, 0x65, 0x2f, 0x7e, 0x61, 0x64, 0x61, 0x6d, 0x2f, 0x75, 0x69, 0x70, 0x2f, 0x29, 0xd, 0xa, 0xd, 0xa, 0 }; diff --git a/uip/apps/webclient/webclient-strings.h b/uip/apps/webclient/webclient-strings.h new file mode 100644 index 0000000..9e3ec93 --- /dev/null +++ b/uip/apps/webclient/webclient-strings.h @@ -0,0 +1,31 @@ +extern const char http_http[8]; +extern const char http_200[5]; +extern const char http_301[5]; +extern const char http_302[5]; +extern const char http_get[5]; +extern const char http_10[9]; +extern const char http_11[9]; +extern const char http_content_type[15]; +extern const char http_texthtml[10]; +extern const char http_location[11]; +extern const char http_host[7]; +extern const char http_crnl[3]; +extern const char http_index_html[12]; +extern const char http_404_html[10]; +extern const char http_content_type_html[28]; +extern const char http_content_type_css [27]; +extern const char http_content_type_text[28]; +extern const char http_content_type_png [28]; +extern const char http_content_type_gif [28]; +extern const char http_content_type_jpg [29]; +extern const char http_content_type_binary[43]; +extern const char http_html[6]; +extern const char http_shtml[7]; +extern const char http_htm[5]; +extern const char http_css[5]; +extern const char http_png[5]; +extern const char http_gif[5]; +extern const char http_jpg[5]; +extern const char http_text[6]; +extern const char http_txt[5]; +extern const char http_user_agent_fields[77]; diff --git a/uip/apps/webclient/webclient.c b/uip/apps/webclient/webclient.c new file mode 100644 index 0000000..746c008 --- /dev/null +++ b/uip/apps/webclient/webclient.c @@ -0,0 +1,439 @@ +/** + * \addtogroup apps + * @{ + */ + +/** + * \defgroup webclient Web client + * @{ + * + * This example shows a HTTP client that is able to download web pages + * and files from web servers. It requires a number of callback + * functions to be implemented by the module that utilizes the code: + * webclient_datahandler(), webclient_connected(), + * webclient_timedout(), webclient_aborted(), webclient_closed(). + */ + +/** + * \file + * Implementation of the HTTP client. + * \author Adam Dunkels <adam@dunkels.com> + */ + +/* + * Copyright (c) 2002, Adam Dunkels. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This file is part of the uIP TCP/IP stack. + * + * $Id: webclient.c,v 1.2 2006/06/11 21:46:37 adam Exp $ + * + */ + +#include "uip.h" +#include "uiplib.h" +#include "webclient.h" +#include "resolv.h" + +#include <string.h> + +#define WEBCLIENT_TIMEOUT 100 + +#define WEBCLIENT_STATE_STATUSLINE 0 +#define WEBCLIENT_STATE_HEADERS 1 +#define WEBCLIENT_STATE_DATA 2 +#define WEBCLIENT_STATE_CLOSE 3 + +#define HTTPFLAG_NONE 0 +#define HTTPFLAG_OK 1 +#define HTTPFLAG_MOVED 2 +#define HTTPFLAG_ERROR 3 + + +#define ISO_nl 0x0a +#define ISO_cr 0x0d +#define ISO_space 0x20 + + +static struct webclient_state s; + +/*-----------------------------------------------------------------------------------*/ +char * +webclient_mimetype(void) +{ + return s.mimetype; +} +/*-----------------------------------------------------------------------------------*/ +char * +webclient_filename(void) +{ + return s.file; +} +/*-----------------------------------------------------------------------------------*/ +char * +webclient_hostname(void) +{ + return s.host; +} +/*-----------------------------------------------------------------------------------*/ +unsigned short +webclient_port(void) +{ + return s.port; +} +/*-----------------------------------------------------------------------------------*/ +void +webclient_init(void) +{ + +} +/*-----------------------------------------------------------------------------------*/ +static void +init_connection(void) +{ + s.state = WEBCLIENT_STATE_STATUSLINE; + + s.getrequestleft = sizeof(http_get) - 1 + 1 + + sizeof(http_10) - 1 + + sizeof(http_crnl) - 1 + + sizeof(http_host) - 1 + + sizeof(http_crnl) - 1 + + strlen(http_user_agent_fields) + + strlen(s.file) + strlen(s.host); + s.getrequestptr = 0; + + s.httpheaderlineptr = 0; +} +/*-----------------------------------------------------------------------------------*/ +void +webclient_close(void) +{ + s.state = WEBCLIENT_STATE_CLOSE; +} +/*-----------------------------------------------------------------------------------*/ +unsigned char +webclient_get(char *host, u16_t port, char *file) +{ + struct uip_conn *conn; + uip_ipaddr_t *ipaddr; + static uip_ipaddr_t addr; + + /* First check if the host is an IP address. */ + ipaddr = &addr; + if(uiplib_ipaddrconv(host, (unsigned char *)addr) == 0) { + ipaddr = (uip_ipaddr_t *)resolv_lookup(host); + + if(ipaddr == NULL) { + return 0; + } + } + + conn = uip_connect(ipaddr, htons(port)); + + if(conn == NULL) { + return 0; + } + + s.port = port; + strncpy(s.file, file, sizeof(s.file)); + strncpy(s.host, host, sizeof(s.host)); + + init_connection(); + return 1; +} +/*-----------------------------------------------------------------------------------*/ +static unsigned char * +copy_string(unsigned char *dest, + const unsigned char *src, unsigned char len) +{ + strncpy(dest, src, len); + return dest + len; +} +/*-----------------------------------------------------------------------------------*/ +static void +senddata(void) +{ + u16_t len; + char *getrequest; + char *cptr; + + if(s.getrequestleft > 0) { + cptr = getrequest = (char *)uip_appdata; + + cptr = copy_string(cptr, http_get, sizeof(http_get) - 1); + cptr = copy_string(cptr, s.file, strlen(s.file)); + *cptr++ = ISO_space; + cptr = copy_string(cptr, http_10, sizeof(http_10) - 1); + + cptr = copy_string(cptr, http_crnl, sizeof(http_crnl) - 1); + + cptr = copy_string(cptr, http_host, sizeof(http_host) - 1); + cptr = copy_string(cptr, s.host, strlen(s.host)); + cptr = copy_string(cptr, http_crnl, sizeof(http_crnl) - 1); + + cptr = copy_string(cptr, http_user_agent_fields, + strlen(http_user_agent_fields)); + + len = s.getrequestleft > uip_mss()? + uip_mss(): + s.getrequestleft; + uip_send(&(getrequest[s.getrequestptr]), len); + } +} +/*-----------------------------------------------------------------------------------*/ +static void +acked(void) +{ + u16_t len; + + if(s.getrequestleft > 0) { + len = s.getrequestleft > uip_mss()? + uip_mss(): + s.getrequestleft; + s.getrequestleft -= len; + s.getrequestptr += len; + } +} +/*-----------------------------------------------------------------------------------*/ +static u16_t +parse_statusline(u16_t len) +{ + char *cptr; + + while(len > 0 && s.httpheaderlineptr < sizeof(s.httpheaderline)) { + s.httpheaderline[s.httpheaderlineptr] = *(char *)uip_appdata; + ++((char *)uip_appdata); + --len; + if(s.httpheaderline[s.httpheaderlineptr] == ISO_nl) { + + if((strncmp(s.httpheaderline, http_10, + sizeof(http_10) - 1) == 0) || + (strncmp(s.httpheaderline, http_11, + sizeof(http_11) - 1) == 0)) { + cptr = &(s.httpheaderline[9]); + s.httpflag = HTTPFLAG_NONE; + if(strncmp(cptr, http_200, sizeof(http_200) - 1) == 0) { + /* 200 OK */ + s.httpflag = HTTPFLAG_OK; + } else if(strncmp(cptr, http_301, sizeof(http_301) - 1) == 0 || + strncmp(cptr, http_302, sizeof(http_302) - 1) == 0) { + /* 301 Moved permanently or 302 Found. Location: header line + will contain thw new location. */ + s.httpflag = HTTPFLAG_MOVED; + } else { + s.httpheaderline[s.httpheaderlineptr - 1] = 0; + } + } else { + uip_abort(); + webclient_aborted(); + return 0; + } + + /* We're done parsing the status line, so we reset the pointer + and start parsing the HTTP headers.*/ + s.httpheaderlineptr = 0; + s.state = WEBCLIENT_STATE_HEADERS; + break; + } else { + ++s.httpheaderlineptr; + } + } + return len; +} +/*-----------------------------------------------------------------------------------*/ +static char +casecmp(char *str1, const char *str2, char len) +{ + static char c; + + while(len > 0) { + c = *str1; + /* Force lower-case characters. */ + if(c & 0x40) { + c |= 0x20; + } + if(*str2 != c) { + return 1; + } + ++str1; + ++str2; + --len; + } + return 0; +} +/*-----------------------------------------------------------------------------------*/ +static u16_t +parse_headers(u16_t len) +{ + char *cptr; + static unsigned char i; + + while(len > 0 && s.httpheaderlineptr < sizeof(s.httpheaderline)) { + s.httpheaderline[s.httpheaderlineptr] = *(char *)uip_appdata; + ++((char *)uip_appdata); + --len; + if(s.httpheaderline[s.httpheaderlineptr] == ISO_nl) { + /* We have an entire HTTP header line in s.httpheaderline, so + we parse it. */ + if(s.httpheaderline[0] == ISO_cr) { + /* This was the last header line (i.e., and empty "\r\n"), so + we are done with the headers and proceed with the actual + data. */ + s.state = WEBCLIENT_STATE_DATA; + return len; + } + + s.httpheaderline[s.httpheaderlineptr - 1] = 0; + /* Check for specific HTTP header fields. */ + if(casecmp(s.httpheaderline, http_content_type, + sizeof(http_content_type) - 1) == 0) { + /* Found Content-type field. */ + cptr = strchr(s.httpheaderline, ';'); + if(cptr != NULL) { + *cptr = 0; + } + strncpy(s.mimetype, s.httpheaderline + + sizeof(http_content_type) - 1, sizeof(s.mimetype)); + } else if(casecmp(s.httpheaderline, http_location, + sizeof(http_location) - 1) == 0) { + cptr = s.httpheaderline + + sizeof(http_location) - 1; + + if(strncmp(cptr, http_http, 7) == 0) { + cptr += 7; + for(i = 0; i < s.httpheaderlineptr - 7; ++i) { + if(*cptr == 0 || + *cptr == '/' || + *cptr == ' ' || + *cptr == ':') { + s.host[i] = 0; + break; + } + s.host[i] = *cptr; + ++cptr; + } + } + strncpy(s.file, cptr, sizeof(s.file)); + /* s.file[s.httpheaderlineptr - i] = 0;*/ + } + + + /* We're done parsing, so we reset the pointer and start the + next line. */ + s.httpheaderlineptr = 0; + } else { + ++s.httpheaderlineptr; + } + } + return len; +} +/*-----------------------------------------------------------------------------------*/ +static void +newdata(void) +{ + u16_t len; + + len = uip_datalen(); + + if(s.state == WEBCLIENT_STATE_STATUSLINE) { + len = parse_statusline(len); + } + + if(s.state == WEBCLIENT_STATE_HEADERS && len > 0) { + len = parse_headers(len); + } + + if(len > 0 && s.state == WEBCLIENT_STATE_DATA && + s.httpflag != HTTPFLAG_MOVED) { + webclient_datahandler((char *)uip_appdata, len); + } +} +/*-----------------------------------------------------------------------------------*/ +void +webclient_appcall(void) +{ + if(uip_connected()) { + s.timer = 0; + s.state = WEBCLIENT_STATE_STATUSLINE; + senddata(); + webclient_connected(); + return; + } + + if(s.state == WEBCLIENT_STATE_CLOSE) { + webclient_closed(); + uip_abort(); + return; + } + + if(uip_aborted()) { + webclient_aborted(); + } + if(uip_timedout()) { + webclient_timedout(); + } + + + if(uip_acked()) { + s.timer = 0; + acked(); + } + if(uip_newdata()) { + s.timer = 0; + newdata(); + } + if(uip_rexmit() || + uip_newdata() || + uip_acked()) { + senddata(); + } else if(uip_poll()) { + ++s.timer; + if(s.timer == WEBCLIENT_TIMEOUT) { + webclient_timedout(); + uip_abort(); + return; + } + /* senddata();*/ + } + + if(uip_closed()) { + if(s.httpflag != HTTPFLAG_MOVED) { + /* Send NULL data to signal EOF. */ + webclient_datahandler(NULL, 0); + } else { + if(resolv_lookup(s.host) == NULL) { + resolv_query(s.host); + } + webclient_get(s.host, s.port, s.file); + } + } +} +/*-----------------------------------------------------------------------------------*/ + +/** @} */ +/** @} */ diff --git a/uip/apps/webclient/webclient.h b/uip/apps/webclient/webclient.h new file mode 100644 index 0000000..44cb95c --- /dev/null +++ b/uip/apps/webclient/webclient.h @@ -0,0 +1,228 @@ +/** + * \addtogroup webclient + * @{ + */ + +/** + * \file + * Header file for the HTTP client. + * \author Adam Dunkels <adam@dunkels.com> + */ + +/* + * Copyright (c) 2002, Adam Dunkels. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This file is part of the uIP TCP/IP stack. + * + * $Id: webclient.h,v 1.2 2006/06/11 21:46:37 adam Exp $ + * + */ +#ifndef __WEBCLIENT_H__ +#define __WEBCLIENT_H__ + + +#include "webclient-strings.h" +#include "uipopt.h" + +#define WEBCLIENT_CONF_MAX_URLLEN 100 + +struct webclient_state { + u8_t timer; + u8_t state; + u8_t httpflag; + + u16_t port; + char host[40]; + char file[WEBCLIENT_CONF_MAX_URLLEN]; + u16_t getrequestptr; + u16_t getrequestleft; + + char httpheaderline[200]; + u16_t httpheaderlineptr; + + char mimetype[32]; +}; + +typedef struct webclient_state uip_tcp_appstate_t; +#define UIP_APPCALL webclient_appcall + +/** + * Callback function that is called from the webclient code when HTTP + * data has been received. + * + * This function must be implemented by the module that uses the + * webclient code. The function is called from the webclient module + * when HTTP data has been received. The function is not called when + * HTTP headers are received, only for the actual data. + * + * \note This function is called many times, repetedly, when data is + * being received, and not once when all data has been received. + * + * \param data A pointer to the data that has been received. + * \param len The length of the data that has been received. + */ +void webclient_datahandler(char *data, u16_t len); + +/** + * Callback function that is called from the webclient code when the + * HTTP connection has been connected to the web server. + * + * This function must be implemented by the module that uses the + * webclient code. + */ +void webclient_connected(void); + +/** + * Callback function that is called from the webclient code if the + * HTTP connection to the web server has timed out. + * + * This function must be implemented by the module that uses the + * webclient code. + */ +void webclient_timedout(void); + +/** + * Callback function that is called from the webclient code if the + * HTTP connection to the web server has been aborted by the web + * server. + * + * This function must be implemented by the module that uses the + * webclient code. + */ +void webclient_aborted(void); + +/** + * Callback function that is called from the webclient code when the + * HTTP connection to the web server has been closed. + * + * This function must be implemented by the module that uses the + * webclient code. + */ +void webclient_closed(void); + + + +/** + * Initialize the webclient module. + */ +void webclient_init(void); + +/** + * Open an HTTP connection to a web server and ask for a file using + * the GET method. + * + * This function opens an HTTP connection to the specified web server + * and requests the specified file using the GET method. When the HTTP + * connection has been connected, the webclient_connected() callback + * function is called and when the HTTP data arrives the + * webclient_datahandler() callback function is called. + * + * The callback function webclient_timedout() is called if the web + * server could not be contacted, and the webclient_aborted() callback + * function is called if the HTTP connection is aborted by the web + * server. + * + * When the HTTP request has been completed and the HTTP connection is + * closed, the webclient_closed() callback function will be called. + * + * \note If the function is passed a host name, it must already be in + * the resolver cache in order for the function to connect to the web + * server. It is therefore up to the calling module to implement the + * resolver calls and the signal handler used for reporting a resolv + * query answer. + * + * \param host A pointer to a string containing either a host name or + * a numerical IP address in dotted decimal notation (e.g., 192.168.23.1). + * + * \param port The port number to which to connect, in host byte order. + * + * \param file A pointer to the name of the file to get. + * + * \retval 0 if the host name could not be found in the cache, or + * if a TCP connection could not be created. + * + * \retval 1 if the connection was initiated. + */ +unsigned char webclient_get(char *host, u16_t port, char *file); + +/** + * Close the currently open HTTP connection. + */ +void webclient_close(void); +void webclient_appcall(void); + +/** + * Obtain the MIME type of the current HTTP data stream. + * + * \return A pointer to a string contaning the MIME type. The string + * may be empty if no MIME type was reported by the web server. + */ +char *webclient_mimetype(void); + +/** + * Obtain the filename of the current HTTP data stream. + * + * The filename of an HTTP request may be changed by the web server, + * and may therefore not be the same as when the original GET request + * was made with webclient_get(). This function is used for obtaining + * the current filename. + * + * \return A pointer to the current filename. + */ +char *webclient_filename(void); + +/** + * Obtain the hostname of the current HTTP data stream. + * + * The hostname of the web server of an HTTP request may be changed + * by the web server, and may therefore not be the same as when the + * original GET request was made with webclient_get(). This function + * is used for obtaining the current hostname. + * + * \return A pointer to the current hostname. + */ +char *webclient_hostname(void); + +/** + * Obtain the port number of the current HTTP data stream. + * + * The port number of an HTTP request may be changed by the web + * server, and may therefore not be the same as when the original GET + * request was made with webclient_get(). This function is used for + * obtaining the current port number. + * + * \return The port number of the current HTTP data stream, in host byte order. + */ +unsigned short webclient_port(void); + + + +#endif /* __WEBCLIENT_H__ */ + +/** @} */ |