Annotation of libwww/Library/src/HTBound.c, revision 2.12
2.12 ! 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: ** @(#) $Id: HTBound.c,v 2.11 1998/11/30 03:52:36 frystyk Exp $
! 7: **
! 8: ** This stream parses a MIME multipart stream and builds a set of new
! 9: ** streams via the stream stack each time we encounter a boundary start.
! 10: ** We get the boundary from the normal MIME parser via the Request object
! 11: **
! 12: ** Authors
! 13: ** HF Henrik Frystyk <frystyk@w3.org>
! 14: **
! 15: ** History:
! 16: ** Nov 95 Written from scratch
! 17: **
! 18: */
! 19:
! 20: /* Library include files */
! 21: #include "wwwsys.h"
! 22: #include "WWWUtil.h"
! 23: #include "WWWCore.h"
! 24: #include "WWWStream.h"
! 25: #include "HTReqMan.h"
! 26: #include "HTBound.h" /* Implemented here */
! 27:
! 28: #define PUTBLOCK(b, l) (*me->target->isa->put_block)(me->target, b, l)
! 29: #define PUTDEBUG(b, l) (*me->debug->isa->put_block)(me->debug, b, l)
! 30: #define FREE_TARGET (*me->target->isa->_free)(me->target)
! 31:
! 32: struct _HTStream {
! 33: const HTStreamClass * isa;
! 34: HTStream * target;
! 35: HTStream * orig_target;
! 36: HTFormat format;
! 37: HTStream * debug; /* For preamble and epilog */
! 38: HTRequest * request;
! 39: BOOL body; /* Body or preamble|epilog */
! 40: HTEOLState state;
! 41: int dash; /* Number of dashes */
! 42: char * boundary;
! 43: char * bpos;
! 44: };
! 45:
! 46: /* ------------------------------------------------------------------------- */
! 47:
! 48: PRIVATE int HTBoundary_put_block (HTStream * me, const char * b, int l)
! 49: {
! 50: const char *start = b;
! 51: const char *end = b;
! 52: while (l-- > 0) {
! 53: if (me->state == EOL_FCR) {
! 54: me->state = (*b == LF) ? EOL_FLF : EOL_BEGIN;
! 55: } else if (me->state == EOL_FLF) {
! 56: if (me->dash == 2) {
! 57: while (l>0 && *me->bpos && *me->bpos==*b) l--, me->bpos++, b++;
! 58: if (!*me->bpos) {
! 59: if (STREAM_TRACE && !*me->bpos)
! 60: HTTrace("Boundary.... `%s\' found\n", me->boundary);
! 61: me->bpos = me->boundary;
! 62: me->body = YES;
! 63: me->state = EOL_DOT;
! 64: } else if (l>0) {
! 65: me->dash = 0;
! 66: me->bpos = me->boundary;
! 67: me->state = EOL_BEGIN;
! 68: }
! 69: }
! 70: if (*b == '-') {
! 71: me->dash++;
! 72: } else if (*b != CR && *b != LF) {
! 73: me->dash = 0;
! 74: me->state = EOL_BEGIN;
! 75: }
! 76: } else if (me->state == EOL_SLF) { /* Look for closing '--' */
! 77: if (me->dash == 4) {
! 78: if (end > start) {
! 79: int status = PUTBLOCK(start, end-start);
! 80: if (status != HT_OK) return status;
! 81: }
! 82: if (STREAM_TRACE) HTTrace("Boundary.... Ending\n");
! 83: start = b;
! 84: me->dash = 0;
! 85: me->state = EOL_BEGIN;
! 86: }
! 87: if (*b == '-') {
! 88: me->dash++;
! 89: } else if (*b != CR && *b != LF) {
! 90: me->dash = 0;
! 91: me->state = EOL_BEGIN;
! 92: }
! 93: me->body = NO;
! 94: } else if (me->state == EOL_DOT) {
! 95: int status;
! 96: if (me->body) {
! 97: if (me->target) FREE_TARGET;
! 98: me->target = HTStreamStack(WWW_MIME,me->format,
! 99: HTMerge(me->orig_target, 2),
! 100: me->request, YES);
! 101: if (end > start) {
! 102: if ((status = PUTBLOCK(start, end-start)) != HT_OK)
! 103: return status;
! 104: }
! 105: } else {
! 106: if (me->debug)
! 107: if ((status = PUTDEBUG(start, end-start)) != HT_OK)
! 108: return status;
! 109: }
! 110: start = b;
! 111: if (*b == '-') me->dash++;
! 112: me->state = EOL_SLF;
! 113: } else if (*b == CR) {
! 114: me->state = EOL_FCR;
! 115: end = b;
! 116: } else if (*b == LF) {
! 117: if (me->state != EOL_FCR) end = b;
! 118: me->state = EOL_FLF;
! 119: }
! 120: b++;
! 121: }
! 122: return (start<b && me->body) ? PUTBLOCK(start, b-start) : HT_OK;
! 123: }
! 124:
! 125: PRIVATE int HTBoundary_put_string (HTStream * me, const char * s)
! 126: {
! 127: return HTBoundary_put_block(me, s, (int) strlen(s));
! 128: }
! 129:
! 130: PRIVATE int HTBoundary_put_character (HTStream * me, char c)
! 131: {
! 132: return HTBoundary_put_block(me, &c, 1);
! 133: }
! 134:
! 135: PRIVATE int HTBoundary_flush (HTStream * me)
! 136: {
! 137: return (*me->target->isa->flush)(me->target);
! 138: }
! 139:
! 140: PRIVATE int HTBoundary_free (HTStream * me)
! 141: {
! 142: int status = HT_OK;
! 143: if (me->target) {
! 144: if ((status = (*me->target->isa->_free)(me->target)) == HT_WOULD_BLOCK)
! 145: return HT_WOULD_BLOCK;
! 146: }
! 147: if (PROT_TRACE) HTTrace("Boundary.... FREEING....\n");
! 148: HT_FREE(me->boundary);
! 149: HT_FREE(me);
! 150: return status;
! 151: }
! 152:
! 153: PRIVATE int HTBoundary_abort (HTStream * me, HTList * e)
! 154: {
! 155: int status = HT_ERROR;
! 156: if (me->target) status = (*me->target->isa->abort)(me->target, e);
! 157: if (PROT_TRACE) HTTrace("Boundary.... ABORTING...\n");
! 158: HT_FREE(me->boundary);
! 159: HT_FREE(me);
! 160: return status;
! 161: }
! 162:
! 163: PRIVATE const HTStreamClass HTBoundaryClass =
! 164: {
! 165: "HTBoundary",
! 166: HTBoundary_flush,
! 167: HTBoundary_free,
! 168: HTBoundary_abort,
! 169: HTBoundary_put_character,
! 170: HTBoundary_put_string,
! 171: HTBoundary_put_block
! 172: };
! 173:
! 174: PUBLIC HTStream * HTBoundary (HTRequest * request,
! 175: void * param,
! 176: HTFormat input_format,
! 177: HTFormat output_format,
! 178: HTStream * output_stream)
! 179: {
! 180: HTResponse * response = HTRequest_response(request);
! 181: HTParentAnchor * anchor = HTRequest_anchor(request);
! 182: HTAssocList * type_param = response ?
! 183: HTResponse_formatParam(response) :
! 184: HTAnchor_formatParam(anchor);
! 185: char * boundary = HTAssocList_findObject(type_param, "boundary");
! 186: if (boundary) {
! 187: HTStream * me;
! 188: if ((me = (HTStream *) HT_CALLOC(1, sizeof(HTStream))) == NULL)
! 189: HT_OUTOFMEM("HTBoundary");
! 190: me->isa = &HTBoundaryClass;
! 191: me->request = request;
! 192: me->format = output_format;
! 193: me->orig_target = output_stream;
! 194: me->debug = HTRequest_debugStream(request);
! 195: me->state = EOL_FLF;
! 196: StrAllocCopy(me->boundary, boundary); /* Local copy */
! 197: me->bpos = me->boundary;
! 198: if (STREAM_TRACE)
! 199: HTTrace("Boundary.... Stream created with boundary '%s\'\n", me->boundary);
! 200: return me;
! 201: } else {
! 202: if (STREAM_TRACE) HTTrace("Boundary.... UNKNOWN boundary!\n");
! 203: return HTErrorStream();
! 204: }
! 205: }
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