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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.
2.13 ! frystyk 6: ** @(#) $Id: HTBound.c,v 2.12 1999/01/25 23:17:00 frystyk Exp $
2.12 frystyk 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"
2.13 ! frystyk 24: #include "HTMerge.h"
2.12 frystyk 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: }