Annotation of libwww/Library/src/HTBound.c, revision 2.1
2.1 ! frystyk 1: /* HTBound.c
! 2: ** MIME MULTIPART PARSER STREAM
! 3: **
! 4: ** (c) COPYRIGHT MIT 1995.
! 5: ** Please first read the full copyright statement in the file COPYRIGH.
! 6: **
! 7: ** This stream parses a MIME multipart stream and builds a set of new
! 8: ** streams via the stream stack each time we encounter a boundary start.
! 9: ** We get the boundary from the normal MIME parser via the Request object
! 10: **
! 11: ** Authors
! 12: ** HF Henrik Frystyk <frystyk@w3.org>
! 13: **
! 14: ** History:
! 15: ** Nov 95 Written from scratch
! 16: **
! 17: */
! 18:
! 19: /* Library include files */
! 20: #include "tcp.h"
! 21: #include "HTUtils.h"
! 22: #include "HTString.h"
! 23: #include "HTParse.h"
! 24: #include "HTSocket.h"
! 25: #include "HTStream.h"
! 26: #include "HTFWrite.h"
! 27: #include "HTReqMan.h"
! 28: #include "HTBound.h" /* Implemented here */
! 29:
! 30: #define PUTBLOCK(b, l) (*me->target->isa->put_block)(me->target, b, l)
! 31: #define PUTDEBUG(b, l) (*me->debug->isa->put_block)(me->debug, b, l)
! 32: #define FREE_TARGET (*me->target->isa->_free)(me->target)
! 33:
! 34: struct _HTStream {
! 35: CONST HTStreamClass * isa;
! 36: HTStream * target;
! 37: HTStream * orig_target;
! 38: HTFormat format;
! 39: HTStream * debug; /* For preamble and epilog */
! 40: HTRequest * request;
! 41: BOOL body; /* Body or preamble|epilog */
! 42: HTSocketEOL state;
! 43: int dash; /* Number of dashes */
! 44: char * boundary;
! 45: char * bpos;
! 46: };
! 47:
! 48: /* ------------------------------------------------------------------------- */
! 49:
! 50: /*
! 51: ** Searches for FTP line until buffer fills up or a CRLF or LF is found
! 52: */
! 53: PRIVATE int HTBoundary_put_block (HTStream * me, CONST char * b, int l)
! 54: {
! 55: CONST char *start = b;
! 56: CONST char *end = b;
! 57: while (l-- > 0) {
! 58: if (me->state == EOL_FCR) {
! 59: me->state = (*b == LF) ? EOL_FLF : EOL_BEGIN;
! 60: } else if (me->state == EOL_FLF) {
! 61: if (me->dash == 2) {
! 62: while (l>0 && *me->bpos && *me->bpos==*b) l--, me->bpos++, b++;
! 63: if (!*me->bpos) {
! 64: if (STREAM_TRACE && !*me->bpos)
! 65: TTYPrint(TDEST, "Boundary.... `%s\' found\n", me->boundary);
! 66: me->bpos = me->boundary;
! 67: me->body = YES;
! 68: me->state = EOL_DOT;
! 69: } else if (l>0) {
! 70: me->dash = 0;
! 71: me->bpos = me->boundary;
! 72: me->state = EOL_BEGIN;
! 73: }
! 74: }
! 75: if (*b == '-') {
! 76: me->dash++;
! 77: } else if (*b != LF) {
! 78: me->dash = 0;
! 79: me->state = EOL_BEGIN;
! 80: }
! 81: } else if (me->state == EOL_SLF) { /* Look for closing '--' */
! 82: if (me->dash == 4) {
! 83: if (end > start) {
! 84: int status = PUTBLOCK(start, end-start);
! 85: if (status != HT_OK) return status;
! 86: }
! 87: if (STREAM_TRACE) TTYPrint(TDEST, "Boundary.... Ending\n");
! 88: start = b;
! 89: me->dash = 0;
! 90: me->state = EOL_BEGIN;
! 91: }
! 92: if (*b == '-') {
! 93: me->dash++;
! 94: } else if (*b != LF) {
! 95: me->dash = 0;
! 96: me->state = EOL_BEGIN;
! 97: }
! 98: me->body = NO;
! 99: } else if (me->state == EOL_DOT) {
! 100: int status;
! 101: if (me->body) {
! 102: if (me->target) FREE_TARGET;
! 103: me->target = HTStreamStack(WWW_MIME,me->format,me->orig_target,
! 104: me->request, YES);
! 105: if (end > start) {
! 106: if ((status = PUTBLOCK(start, end-start)) != HT_OK)
! 107: return status;
! 108: }
! 109: } else {
! 110: if (me->debug)
! 111: if ((status = PUTDEBUG(start, end-start)) != HT_OK)
! 112: return status;
! 113: }
! 114: start = b;
! 115: if (*b == '-') me->dash++;
! 116: me->state = EOL_SLF;
! 117: } else if (*b == CR) {
! 118: me->state = EOL_FCR;
! 119: end = b;
! 120: } else if (*b == LF) {
! 121: if (me->state != EOL_FCR) end = b;
! 122: me->state = EOL_FLF;
! 123: }
! 124: b++;
! 125: }
! 126: return (start<b && me->body) ? PUTBLOCK(start, b-start) : HT_OK;
! 127: }
! 128:
! 129: PRIVATE int HTBoundary_put_string (HTStream * me, CONST char * s)
! 130: {
! 131: return HTBoundary_put_block(me, s, (int) strlen(s));
! 132: }
! 133:
! 134: PRIVATE int HTBoundary_put_character (HTStream * me, char c)
! 135: {
! 136: return HTBoundary_put_block(me, &c, 1);
! 137: }
! 138:
! 139: PRIVATE int HTBoundary_flush (HTStream * me)
! 140: {
! 141: return (*me->target->isa->flush)(me->target);
! 142: }
! 143:
! 144: PRIVATE int HTBoundary_free (HTStream * me)
! 145: {
! 146: int status = HT_OK;
! 147: if (me->target) {
! 148: if ((status = (*me->target->isa->_free)(me->target)) == HT_WOULD_BLOCK)
! 149: return HT_WOULD_BLOCK;
! 150: }
! 151: if (PROT_TRACE) TTYPrint(TDEST, "Boundary.... FREEING....\n");
! 152: FREE(me->boundary);
! 153: free(me);
! 154: return status;
! 155: }
! 156:
! 157: PRIVATE int HTBoundary_abort (HTStream * me, HTList * e)
! 158: {
! 159: int status = HT_ERROR;
! 160: if (me->target) status = (*me->target->isa->abort)(me->target, e);
! 161: if (PROT_TRACE) TTYPrint(TDEST, "Boundary.... ABORTING...\n");
! 162: FREE(me->boundary);
! 163: free(me);
! 164: return status;
! 165: }
! 166:
! 167: PRIVATE CONST HTStreamClass HTBoundaryClass =
! 168: {
! 169: "HTBoundary",
! 170: HTBoundary_flush,
! 171: HTBoundary_free,
! 172: HTBoundary_abort,
! 173: HTBoundary_put_character,
! 174: HTBoundary_put_string,
! 175: HTBoundary_put_block
! 176: };
! 177:
! 178: PUBLIC HTStream * HTBoundary (HTRequest * request,
! 179: void * param,
! 180: HTFormat input_format,
! 181: HTFormat output_format,
! 182: HTStream * output_stream)
! 183: {
! 184: HTStream * me = (HTStream *) calloc(1, sizeof(HTStream));
! 185: if (!me) outofmem(__FILE__, "HTBoundary");
! 186: me->isa = &HTBoundaryClass;
! 187: me->request = request;
! 188: me->format = output_format;
! 189: me->orig_target = output_stream;
! 190: me->debug = HTRequest_debugStream(request);
! 191: me->state = EOL_FLF;
! 192: if (request->boundary) {
! 193: StrAllocCopy(me->boundary, request->boundary); /* Local copy */
! 194: me->bpos = me->boundary;
! 195: if (STREAM_TRACE)
! 196: TTYPrint(TDEST,"Boundary.... Stream created with boundary '%s\'\n", me->boundary);
! 197: return me;
! 198: } else {
! 199: if (STREAM_TRACE) TTYPrint(TDEST, "Boundary.... <UNKNOWN>\n");
! 200: return HTBlackHole();
! 201: }
! 202: }
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