2 * "$Id: http.c,v 1.50 1999/10/07 19:13:34 mike Exp $"
4 * HTTP routines for the Common UNIX Printing System (CUPS) scheduler.
6 * Copyright 1997-1999 by Easy Software Products, all rights reserved.
8 * These statusd instructions, statements, and computer programs are the
9 * property of Easy Software Products and are protected by Federal
10 * copyright law. Distribution and use rights are outlined in the file
11 * "LICENSE.txt" which should have been included with this file. If this
12 * file is missing or damaged please contact Easy Software Products
15 * Attn: CUPS Licensing Information
16 * Easy Software Products
17 * 44141 Airport View Drive, Suite 204
18 * Hollywood, Maryland 20636-3111 USA
20 * Voice: (301) 373-9603
21 * EMail: cups-info@cups.org
22 * WWW: http://www.cups.org
26 * httpInitialize() - Initialize the HTTP interface library and set the
27 * default HTTP proxy (if any).
28 * httpCheck() - Check to see if there is a pending response from
30 * httpClose() - Close an HTTP connection...
31 * httpConnect() - Connect to a HTTP server.
32 * httpReconnect() - Reconnect to a HTTP server...
33 * httpSeparate() - Separate a Universal Resource Identifier into its
35 * httpSetField() - Set the value of an HTTP header.
36 * httpDelete() - Send a DELETE request to the server.
37 * httpGet() - Send a GET request to the server.
38 * httpHead() - Send a HEAD request to the server.
39 * httpOptions() - Send an OPTIONS request to the server.
40 * httpPost() - Send a POST request to the server.
41 * httpPut() - Send a PUT request to the server.
42 * httpTrace() - Send an TRACE request to the server.
43 * httpFlush() - Flush data from a HTTP connection.
44 * httpRead() - Read data from a HTTP connection.
45 * httpWrite() - Write data to a HTTP connection.
46 * httpGets() - Get a line of text from a HTTP connection.
47 * httpPrintf() - Print a formatted string to a HTTP connection.
48 * httpStatus() - Return a short string describing a HTTP status code.
49 * httpGetDateString() - Get a formatted date/time string from a time value.
50 * httpGetDateTime() - Get a time value from a formatted date/time string.
51 * httpUpdate() - Update the current HTTP state for incoming data.
52 * httpDecode64() - Base64-decode a string.
53 * httpEncode64() - Base64-encode a string.
54 * httpGetLength() - Get the amount of data remaining from the
55 * content-length or transfer-encoding fields.
56 * http_field() - Return the field index for a field name.
57 * http_send() - Send a request with all fields and the trailing
62 * Include necessary headers...
77 #if !defined(WIN32) && !defined(__EMX__)
79 #endif /* !WIN32 && !__EMX__ */
82 * Some operating systems have done away with the Fxxxx constants for
83 * the fcntl() call; this works around that "feature"...
87 # define FNONBLK O_NONBLOCK
95 static http_field_t
http_field(const char *name
);
96 static int http_send(http_t
*http
, http_state_t request
,
104 static const char *http_fields
[] =
121 "If-Unmodified-since",
134 static const char *days
[7] =
144 static const char *months
[12] =
162 * 'httpInitialize()' - Initialize the HTTP interface library and set the
163 * default HTTP proxy (if any).
169 #if defined(WIN32) || defined(__EMX__)
170 WSADATA winsockdata
; /* WinSock data */
171 static int initialized
= 0;/* Has WinSock been initialized? */
175 WSAStartup(MAKEWORD(1,1), &winsockdata
);
176 #elif defined(HAVE_SIGSET)
177 sigset(SIGPIPE
, SIG_IGN
);
178 #elif defined(HAVE_SIGACTION)
179 struct sigaction action
; /* POSIX sigaction data */
183 * Ignore SIGPIPE signals...
186 memset(&action
, 0, sizeof(action
));
187 action
.sa_handler
= SIG_IGN
;
188 sigaction(SIGPIPE
, &action
, NULL
);
190 signal(SIGPIPE
, SIG_IGN
);
191 #endif /* WIN32 || __EMX__ */
196 * 'httpCheck()' - Check to see if there is a pending response from the server.
199 int /* O - 0 = no data, 1 = data available */
200 httpCheck(http_t
*http
) /* I - HTTP connection */
202 fd_set input
; /* Input set for select() */
203 struct timeval timeout
; /* Timeout */
207 * First see if there is data in the buffer...
217 * Then try doing a select() to poll the socket...
221 FD_SET(http
->fd
, &input
);
226 return (select(http
->fd
+ 1, &input
, NULL
, NULL
, &timeout
) > 0);
231 * 'httpClose()' - Close an HTTP connection...
235 httpClose(http_t
*http
) /* I - Connection to close */
241 closesocket(http
->fd
);
251 * 'httpConnect()' - Connect to a HTTP server.
254 http_t
* /* O - New HTTP connection */
255 httpConnect(const char *host
, /* I - Host to connect to */
256 int port
) /* I - Port number */
258 http_t
*http
; /* New HTTP connection */
259 struct hostent
*hostaddr
; /* Host address data */
268 if ((hostaddr
= gethostbyname(host
)) == NULL
)
272 * Allocate memory for the structure...
275 http
= calloc(sizeof(http_t
), 1);
279 http
->version
= HTTP_1_1
;
281 http
->activity
= time(NULL
);
284 * Copy the hostname and port and then "reconnect"...
287 strcpy(http
->hostname
, host
);
288 memset((char *)&(http
->hostaddr
), 0, sizeof(http
->hostaddr
));
289 memcpy((char *)&(http
->hostaddr
.sin_addr
), hostaddr
->h_addr
, hostaddr
->h_length
);
290 http
->hostaddr
.sin_family
= hostaddr
->h_addrtype
;
292 http
->hostaddr
.sin_port
= htons((u_short
)port
);
294 http
->hostaddr
.sin_port
= htons(port
);
296 if (httpReconnect(http
))
307 * 'httpReconnect()' - Reconnect to a HTTP server...
310 int /* O - 0 on success, non-zero on failure */
311 httpReconnect(http_t
*http
) /* I - HTTP data */
313 int val
; /* Socket option value */
317 * Close any previously open socket...
322 closesocket(http
->fd
);
328 * Create the socket and set options to allow reuse.
331 if ((http
->fd
= socket(AF_INET
, SOCK_STREAM
, 0)) < 0)
334 http
->status
= HTTP_ERROR
;
339 fcntl(http
->fd
, F_SETFD
, FD_CLOEXEC
); /* Close this socket when starting *
340 * other processes... */
341 #endif /* FD_CLOEXEC */
344 setsockopt(http
->fd
, SOL_SOCKET
, SO_REUSEADDR
, (char *)&val
, sizeof(val
));
348 setsockopt(http
->fd
, SOL_SOCKET
, SO_REUSEPORT
, &val
, sizeof(val
));
349 #endif /* SO_REUSEPORT */
352 * Connect to the server...
355 if (connect(http
->fd
, (struct sockaddr
*)&(http
->hostaddr
),
356 sizeof(http
->hostaddr
)) < 0)
359 http
->status
= HTTP_ERROR
;
362 closesocket(http
->fd
);
371 http
->status
= HTTP_CONTINUE
;
378 * 'httpSeparate()' - Separate a Universal Resource Identifier into its
383 httpSeparate(const char *uri
, /* I - Universal Resource Identifier */
384 char *method
, /* O - Method (http, https, etc.) */
385 char *username
, /* O - Username */
386 char *host
, /* O - Hostname */
387 int *port
, /* O - Port number to use */
388 char *resource
) /* O - Resource/filename */
390 char *ptr
; /* Pointer into string... */
393 if (uri
== NULL
|| method
== NULL
|| username
== NULL
|| host
== NULL
||
394 port
== NULL
|| resource
== NULL
)
398 * Grab the method portion of the URI...
402 while (*uri
!= ':' && *uri
!= '\0')
410 * If the method contains a period or slash, then it's probably
411 * hostname/filename...
414 if (strchr(host
, '.') != NULL
|| strchr(host
, '/') != NULL
|| *uri
== '\0')
416 if ((ptr
= strchr(host
, '/')) != NULL
)
418 strcpy(resource
, ptr
);
427 * OK, we have "hostname:port[/resource]"...
430 *port
= strtol(uri
, (char **)&uri
, 10);
433 strcpy(resource
, uri
);
438 strcpy(method
, "http");
443 strcpy(method
, host
);
446 * If the method starts with less than 2 slashes then it is a local resource...
449 if (strncmp(uri
, "//", 2) != 0)
451 strcpy(resource
, uri
);
459 * Grab the hostname...
466 while (*uri
!= ':' && *uri
!= '@' && *uri
!= '/' && *uri
!= '\0')
477 strcpy(username
, host
);
480 while (*uri
!= ':' && *uri
!= '/' && *uri
!= '\0')
491 * Hostname but no port or path...
499 else if (*uri
== ':')
502 * Parse port number...
507 while (isdigit(*uri
))
509 *port
= (*port
* 10) + *uri
- '0';
516 * Figure out the default port number based on the method...
519 if (strcasecmp(method
, "http") == 0)
521 else if (strcasecmp(method
, "https") == 0)
523 else if (strcasecmp(method
, "ipp") == 0) /* Not registered yet... */
525 else if (strcasecmp(method
, "socket") == 0) /* Not registered yet... */
532 * The remaining portion is the resource string...
535 strcpy(resource
, uri
);
540 * 'httpSetField()' - Set the value of an HTTP header.
544 httpSetField(http_t
*http
, /* I - HTTP data */
545 http_field_t field
, /* I - Field index */
546 const char *value
) /* I - Value */
548 strncpy(http
->fields
[field
], value
, HTTP_MAX_VALUE
- 1);
549 http
->fields
[field
][HTTP_MAX_VALUE
- 1] = '\0';
554 * 'httpDelete()' - Send a DELETE request to the server.
557 int /* O - Status of call (0 = success) */
558 httpDelete(http_t
*http
, /* I - HTTP data */
559 const char *uri
) /* I - URI to delete */
561 return (http_send(http
, HTTP_DELETE
, uri
));
566 * 'httpGet()' - Send a GET request to the server.
569 int /* O - Status of call (0 = success) */
570 httpGet(http_t
*http
, /* I - HTTP data */
571 const char *uri
) /* I - URI to get */
573 return (http_send(http
, HTTP_GET
, uri
));
578 * 'httpHead()' - Send a HEAD request to the server.
581 int /* O - Status of call (0 = success) */
582 httpHead(http_t
*http
, /* I - HTTP data */
583 const char *uri
) /* I - URI for head */
585 return (http_send(http
, HTTP_HEAD
, uri
));
590 * 'httpOptions()' - Send an OPTIONS request to the server.
593 int /* O - Status of call (0 = success) */
594 httpOptions(http_t
*http
, /* I - HTTP data */
595 const char *uri
) /* I - URI for options */
597 return (http_send(http
, HTTP_OPTIONS
, uri
));
602 * 'httpPost()' - Send a POST request to the server.
605 int /* O - Status of call (0 = success) */
606 httpPost(http_t
*http
, /* I - HTTP data */
607 const char *uri
) /* I - URI for post */
611 return (http_send(http
, HTTP_POST
, uri
));
616 * 'httpPut()' - Send a PUT request to the server.
619 int /* O - Status of call (0 = success) */
620 httpPut(http_t
*http
, /* I - HTTP data */
621 const char *uri
) /* I - URI to put */
625 return (http_send(http
, HTTP_PUT
, uri
));
630 * 'httpTrace()' - Send an TRACE request to the server.
633 int /* O - Status of call (0 = success) */
634 httpTrace(http_t
*http
, /* I - HTTP data */
635 const char *uri
) /* I - URI for trace */
637 return (http_send(http
, HTTP_TRACE
, uri
));
642 * 'httpFlush()' - Flush data from a HTTP connection.
646 httpFlush(http_t
*http
) /* I - HTTP data */
648 char buffer
[8192]; /* Junk buffer */
651 while (httpRead(http
, buffer
, sizeof(buffer
)) > 0);
656 * 'httpRead()' - Read data from a HTTP connection.
659 int /* O - Number of bytes read */
660 httpRead(http_t
*http
, /* I - HTTP data */
661 char *buffer
, /* I - Buffer for data */
662 int length
) /* I - Maximum number of bytes */
664 int bytes
; /* Bytes read */
665 char len
[32]; /* Length string */
668 DEBUG_printf(("httpRead(%08x, %08x, %d)\n", http
, buffer
, length
));
670 if (http
== NULL
|| buffer
== NULL
)
673 http
->activity
= time(NULL
);
678 if (http
->data_encoding
== HTTP_ENCODE_CHUNKED
&&
679 http
->data_remaining
<= 0 &&
680 (http
->state
== HTTP_GET_SEND
|| http
->state
== HTTP_POST_RECV
||
681 http
->state
== HTTP_POST_SEND
|| http
->state
== HTTP_PUT_RECV
))
683 if (httpGets(len
, sizeof(len
), http
) == NULL
)
686 http
->data_remaining
= strtol(len
, NULL
, 16);
689 DEBUG_printf(("httpRead: data_remaining = %d\n", http
->data_remaining
));
691 if (http
->data_remaining
== 0)
694 * A zero-length chunk ends a transfer; unless we are reading POST
698 if (http
->data_encoding
== HTTP_ENCODE_CHUNKED
&&
699 (http
->state
== HTTP_GET_SEND
|| http
->state
== HTTP_POST_RECV
||
700 http
->state
== HTTP_POST_SEND
|| http
->state
== HTTP_PUT_RECV
))
701 httpGets(len
, sizeof(len
), http
);
703 if (http
->state
== HTTP_POST_RECV
)
706 http
->state
= HTTP_WAITING
;
710 else if (length
> http
->data_remaining
)
711 length
= http
->data_remaining
;
715 if (length
> http
->used
)
720 DEBUG_printf(("httpRead: grabbing %d bytes from input buffer...\n", bytes
));
722 memcpy(buffer
, http
->buffer
, length
);
723 http
->used
-= length
;
726 memcpy(http
->buffer
, http
->buffer
+ length
, http
->used
);
730 DEBUG_printf(("httpRead: reading %d bytes from socket...\n", length
));
731 bytes
= recv(http
->fd
, buffer
, length
, 0);
732 DEBUG_printf(("httpRead: read %d bytes from socket...\n", bytes
));
736 http
->data_remaining
-= bytes
;
740 if (http
->data_remaining
== 0)
742 if (http
->data_encoding
== HTTP_ENCODE_CHUNKED
&&
743 (http
->state
== HTTP_GET_SEND
|| http
->state
== HTTP_POST_RECV
||
744 http
->state
== HTTP_POST_SEND
|| http
->state
== HTTP_PUT_RECV
))
745 httpGets(len
, sizeof(len
), http
);
747 if (http
->data_encoding
!= HTTP_ENCODE_CHUNKED
)
749 if (http
->state
== HTTP_POST_RECV
)
752 http
->state
= HTTP_WAITING
;
761 * 'httpWrite()' - Write data to a HTTP connection.
764 int /* O - Number of bytes written */
765 httpWrite(http_t
*http
, /* I - HTTP data */
766 const char *buffer
, /* I - Buffer for data */
767 int length
) /* I - Number of bytes to write */
769 int tbytes
, /* Total bytes sent */
770 bytes
; /* Bytes sent */
771 char len
[32]; /* Length string */
774 if (http
== NULL
|| buffer
== NULL
)
777 http
->activity
= time(NULL
);
779 if (http
->data_encoding
== HTTP_ENCODE_CHUNKED
&&
780 (http
->state
== HTTP_GET_SEND
|| http
->state
== HTTP_POST_RECV
||
781 http
->state
== HTTP_POST_SEND
|| http
->state
== HTTP_PUT_RECV
))
782 if (httpPrintf(http
, "%x\r\n", length
) < 0)
788 * A zero-length chunk ends a transfer; unless we are sending POST
792 if (http
->state
== HTTP_POST_RECV
)
795 http
->state
= HTTP_WAITING
;
804 bytes
= send(http
->fd
, buffer
, length
, 0);
807 DEBUG_puts("httpWrite: error writing data...\n");
815 if (http
->data_encoding
== HTTP_ENCODE_LENGTH
)
816 http
->data_remaining
-= bytes
;
819 if (http
->data_encoding
== HTTP_ENCODE_CHUNKED
&&
820 (http
->state
== HTTP_GET_SEND
|| http
->state
== HTTP_POST_RECV
||
821 http
->state
== HTTP_POST_SEND
|| http
->state
== HTTP_PUT_RECV
))
822 if (httpPrintf(http
, "\r\n") < 0)
825 if (http
->data_remaining
== 0 && http
->data_encoding
== HTTP_ENCODE_LENGTH
)
828 * Finished with the transfer; unless we are sending POST data, go idle...
831 if (http
->state
== HTTP_POST_RECV
)
834 http
->state
= HTTP_WAITING
;
837 DEBUG_printf(("httpWrite: wrote %d bytes...\n", tbytes
));
844 * 'httpGets()' - Get a line of text from a HTTP connection.
847 char * /* O - Line or NULL */
848 httpGets(char *line
, /* I - Line to read into */
849 int length
, /* I - Max length of buffer */
850 http_t
*http
) /* I - HTTP data */
852 char *lineptr
, /* Pointer into line */
853 *bufptr
, /* Pointer into input buffer */
854 *bufend
; /* Pointer to end of buffer */
855 int bytes
; /* Number of bytes read */
858 DEBUG_printf(("httpGets(%08x, %d, %08x)\n", line
, length
, http
));
860 if (http
== NULL
|| line
== NULL
)
864 * Pre-scan the buffer and see if there is a newline in there...
871 bufptr
= http
->buffer
;
872 bufend
= http
->buffer
+ http
->used
;
874 while (bufptr
< bufend
)
880 if (bufptr
>= bufend
)
883 * No newline; see if there is more data to be read...
886 if ((bytes
= recv(http
->fd
, bufend
, HTTP_MAX_BUFFER
- http
->used
, 0)) < 0)
889 * Nope, can't get a line this time...
892 if (errno
!= http
->error
)
898 DEBUG_printf(("httpGets(): recv() error %d!\n", errno
));
911 * Yup, update the amount used and the end pointer...
918 while (bufptr
>= bufend
);
920 http
->activity
= time(NULL
);
923 * Read a line from the buffer...
927 bufptr
= http
->buffer
;
930 while (bufptr
< bufend
&& bytes
< length
)
941 memcpy(http
->buffer
, bufptr
, http
->used
);
943 DEBUG_printf(("httpGets(): Returning \"%s\"\n", line
));
946 else if (*bufptr
== 0x0d)
949 *lineptr
++ = *bufptr
++;
952 DEBUG_puts("httpGets(): No new line available!");
959 * 'httpPrintf()' - Print a formatted string to a HTTP connection.
962 int /* O - Number of bytes written */
963 httpPrintf(http_t
*http
, /* I - HTTP data */
964 const char *format
, /* I - printf-style format string */
965 ...) /* I - Additional args as needed */
967 int bytes
, /* Number of bytes to write */
968 nbytes
, /* Number of bytes written */
969 tbytes
; /* Number of bytes all together */
970 char buf
[HTTP_MAX_BUFFER
], /* Buffer for formatted string */
971 *bufptr
; /* Pointer into buffer */
972 va_list ap
; /* Variable argument pointer */
975 va_start(ap
, format
);
976 bytes
= vsprintf(buf
, format
, ap
);
979 DEBUG_printf(("httpPrintf: %s", buf
));
981 for (tbytes
= 0, bufptr
= buf
; tbytes
< bytes
; tbytes
+= nbytes
, bufptr
+= nbytes
)
982 if ((nbytes
= send(http
->fd
, bufptr
, bytes
- tbytes
, 0)) < 0)
990 * 'httpStatus()' - Return a short string describing a HTTP status code.
993 const char * /* O - String or NULL */
994 httpStatus(http_status_t status
) /* I - HTTP status code */
1002 case HTTP_ACCEPTED
:
1003 return ("Accepted");
1004 case HTTP_NO_CONTENT
:
1005 return ("No Content");
1006 case HTTP_NOT_MODIFIED
:
1007 return ("Not Modified");
1008 case HTTP_BAD_REQUEST
:
1009 return ("Bad Request");
1010 case HTTP_UNAUTHORIZED
:
1011 return ("Unauthorized");
1012 case HTTP_FORBIDDEN
:
1013 return ("Forbidden");
1014 case HTTP_NOT_FOUND
:
1015 return ("Not Found");
1016 case HTTP_REQUEST_TOO_LARGE
:
1017 return ("Request Entity Too Large");
1018 case HTTP_URI_TOO_LONG
:
1019 return ("URI Too Long");
1020 case HTTP_NOT_IMPLEMENTED
:
1021 return ("Not Implemented");
1022 case HTTP_NOT_SUPPORTED
:
1023 return ("Not Supported");
1031 * 'httpGetDateString()' - Get a formatted date/time string from a time value.
1034 const char * /* O - Date/time string */
1035 httpGetDateString(time_t t
) /* I - UNIX time */
1038 static char datetime
[256];
1042 sprintf(datetime
, "%s, %02d %s %d %02d:%02d:%02d GMT",
1043 days
[tdate
->tm_wday
], tdate
->tm_mday
, months
[tdate
->tm_mon
],
1044 tdate
->tm_year
+ 1900, tdate
->tm_hour
, tdate
->tm_min
, tdate
->tm_sec
);
1051 * 'httpGetDateTime()' - Get a time value from a formatted date/time string.
1054 time_t /* O - UNIX time */
1055 httpGetDateTime(const char *s
) /* I - Date/time string */
1057 int i
; /* Looping var */
1058 struct tm tdate
; /* Time/date structure */
1059 char mon
[16]; /* Abbreviated month name */
1060 int day
, year
; /* Day of month and year */
1061 int hour
, min
, sec
; /* Time */
1064 if (sscanf(s
, "%*s%d%s%d%d:%d:%d", &day
, mon
, &year
, &hour
, &min
, &sec
) < 6)
1067 for (i
= 0; i
< 12; i
++)
1068 if (strcasecmp(mon
, months
[i
]) == 0)
1075 tdate
.tm_mday
= day
;
1076 tdate
.tm_year
= year
- 1900;
1077 tdate
.tm_hour
= hour
;
1082 return (mktime(&tdate
));
1087 * 'httpUpdate()' - Update the current HTTP state for incoming data.
1090 http_status_t
/* O - HTTP status */
1091 httpUpdate(http_t
*http
) /* I - HTTP data */
1093 char line
[1024], /* Line from connection... */
1094 *value
; /* Pointer to value on line */
1095 http_field_t field
; /* Field index */
1096 int major
, minor
; /* HTTP version numbers */
1097 http_status_t status
; /* Authorization status */
1100 DEBUG_printf(("httpUpdate(%08x)\n", http
));
1103 * If we haven't issued any commands, then there is nothing to "update"...
1106 if (http
->state
== HTTP_WAITING
)
1107 return (HTTP_CONTINUE
);
1110 * Grab all of the lines we can from the connection...
1113 while (httpGets(line
, sizeof(line
), http
) != NULL
)
1117 if (line
[0] == '\0')
1120 * Blank line means the start of the data section (if any). Return
1121 * the result code, too...
1123 * If we get status 100 (HTTP_CONTINUE), then we *don't* change states.
1124 * Instead, we just return HTTP_CONTINUE to the caller and keep on
1128 if (http
->status
== HTTP_CONTINUE
)
1129 return (http
->status
);
1131 httpGetLength(http
);
1133 switch (http
->state
)
1137 case HTTP_POST_RECV
:
1143 http
->state
= HTTP_WAITING
;
1147 return (http
->status
);
1149 else if (strncmp(line
, "HTTP/", 5) == 0)
1152 * Got the beginning of a response...
1155 if (sscanf(line
, "HTTP/%d.%d%d", &major
, &minor
, &status
) != 3)
1156 return (HTTP_ERROR
);
1158 http
->version
= (http_version_t
)(major
* 100 + minor
);
1159 http
->status
= status
;
1161 else if ((value
= strchr(line
, ':')) != NULL
)
1168 while (isspace(*value
))
1172 * Be tolerants of servers that send unknown attribute fields...
1175 if ((field
= http_field(line
)) == HTTP_FIELD_UNKNOWN
)
1177 DEBUG_printf(("httpUpdate: unknown field %s seen!\n", line
));
1181 httpSetField(http
, field
, value
);
1185 http
->status
= HTTP_ERROR
;
1186 return (HTTP_ERROR
);
1191 * See if there was an error...
1196 http
->status
= HTTP_ERROR
;
1197 return (HTTP_ERROR
);
1201 * If we haven't already returned, then there is nothing new...
1204 return (HTTP_CONTINUE
);
1209 * 'httpDecode64()' - Base64-decode a string.
1212 char * /* O - Decoded string */
1213 httpDecode64(char *out
, /* I - String to write to */
1214 const char *in
) /* I - String to read from */
1216 int pos
, /* Bit position */
1217 base64
; /* Value of this character */
1218 char *outptr
; /* Output pointer */
1221 for (outptr
= out
, pos
= 0; *in
!= '\0'; in
++)
1224 * Decode this character into a number from 0 to 63...
1227 if (*in
>= 'A' && *in
<= 'Z')
1229 else if (*in
>= 'a' && *in
<= 'z')
1230 base64
= *in
- 'a' + 26;
1231 else if (*in
>= '0' && *in
<= '9')
1232 base64
= *in
- '0' + 52;
1233 else if (*in
== '+')
1235 else if (*in
== '/')
1237 else if (*in
== '=')
1243 * Store the result in the appropriate chars...
1249 *outptr
= base64
<< 2;
1253 *outptr
++ |= (base64
>> 4) & 3;
1254 *outptr
= (base64
<< 4) & 255;
1258 *outptr
++ |= (base64
>> 2) & 15;
1259 *outptr
= (base64
<< 6) & 255;
1263 *outptr
++ |= base64
;
1272 * Return the decoded string...
1280 * 'httpEncode64()' - Base64-encode a string.
1283 char * /* O - Encoded string */
1284 httpEncode64(char *out
, /* I - String to write to */
1285 const char *in
) /* I - String to read from */
1287 char *outptr
; /* Output pointer */
1288 static char base64
[] = /* Base64 characters... */
1290 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1291 "abcdefghijklmnopqrstuvwxyz"
1297 for (outptr
= out
; *in
!= '\0'; in
++)
1300 * Encode the up to 3 characters as 4 Base64 numbers...
1303 *outptr
++ = base64
[in
[0] >> 2];
1304 *outptr
++ = base64
[((in
[0] << 4) | (in
[1] >> 4)) & 63];
1313 *outptr
++ = base64
[((in
[0] << 2) | (in
[1] >> 6)) & 63];
1319 *outptr
++ = base64
[in
[0] & 63];
1326 * Return the encoded string...
1334 * 'httpGetLength()' - Get the amount of data remaining from the
1335 * content-length or transfer-encoding fields.
1338 int /* O - Content length */
1339 httpGetLength(http_t
*http
) /* I - HTTP data */
1341 if (strcasecmp(http
->fields
[HTTP_FIELD_TRANSFER_ENCODING
], "chunked") == 0)
1343 http
->data_encoding
= HTTP_ENCODE_CHUNKED
;
1344 http
->data_remaining
= 0;
1348 http
->data_encoding
= HTTP_ENCODE_LENGTH
;
1351 * The following is a hack for HTTP servers that don't send a
1352 * content-length or transfer-encoding field...
1354 * If there is no content-length then the connection must close
1355 * after the transfer is complete...
1358 if (http
->fields
[HTTP_FIELD_CONTENT_LENGTH
][0] == '\0')
1359 http
->data_remaining
= 2147483647;
1361 http
->data_remaining
= atoi(http
->fields
[HTTP_FIELD_CONTENT_LENGTH
]);
1364 return (http
->data_remaining
);
1369 * 'http_field()' - Return the field index for a field name.
1372 static http_field_t
/* O - Field index */
1373 http_field(const char *name
) /* I - String name */
1375 int i
; /* Looping var */
1378 for (i
= 0; i
< HTTP_FIELD_MAX
; i
++)
1379 if (strcasecmp(name
, http_fields
[i
]) == 0)
1380 return ((http_field_t
)i
);
1382 return (HTTP_FIELD_UNKNOWN
);
1387 * 'http_send()' - Send a request with all fields and the trailing blank line.
1390 static int /* O - 0 on success, non-zero on error */
1391 http_send(http_t
*http
, /* I - HTTP data */
1392 http_state_t request
, /* I - Request code */
1393 const char *uri
) /* I - URI */
1395 int i
; /* Looping var */
1396 char *ptr
, /* Pointer in buffer */
1397 buf
[1024]; /* Encoded URI buffer */
1398 static const char *codes
[] = /* Request code strings */
1414 static const char *hex
= "0123456789ABCDEF";
1418 if (http
== NULL
|| uri
== NULL
)
1422 * Encode the URI as needed...
1425 for (ptr
= buf
; *uri
!= '\0'; uri
++)
1426 if (*uri
<= ' ' || *uri
>= 127)
1429 *ptr
++ = hex
[(*uri
>> 4) & 15];
1430 *ptr
++ = hex
[*uri
& 15];
1438 * See if we had an error the last time around; if so, reconnect...
1441 if (http
->status
== HTTP_ERROR
|| http
->status
>= HTTP_BAD_REQUEST
)
1442 httpReconnect(http
);
1445 * Send the request header...
1448 http
->state
= request
;
1449 if (request
== HTTP_POST
|| request
== HTTP_PUT
)
1452 http
->status
= HTTP_CONTINUE
;
1454 if (httpPrintf(http
, "%s %s HTTP/1.1\r\n", codes
[request
], buf
) < 1)
1456 http
->status
= HTTP_ERROR
;
1460 for (i
= 0; i
< HTTP_FIELD_MAX
; i
++)
1461 if (http
->fields
[i
][0] != '\0')
1463 DEBUG_printf(("%s: %s\n", http_fields
[i
], http
->fields
[i
]));
1465 if (httpPrintf(http
, "%s: %s\r\n", http_fields
[i
], http
->fields
[i
]) < 1)
1467 http
->status
= HTTP_ERROR
;
1472 if (httpPrintf(http
, "\r\n") < 1)
1474 http
->status
= HTTP_ERROR
;
1478 httpClearFields(http
);
1485 * End of "$Id: http.c,v 1.50 1999/10/07 19:13:34 mike Exp $".