Annotation of libwww/Library/src/HTMIMERq.c, revision 2.37
2.1 frystyk 1: /* HTMIMERq.c
2.10 frystyk 2: ** MIME ENTITY HEADERS GENERATION
2.1 frystyk 3: **
2.15 frystyk 4: ** (c) COPYRIGHT MIT 1995.
5: ** Please first read the full copyright statement in the file COPYRIGH.
2.37 ! frystyk 6: ** @(#) $Id: HTMIMERq.c,v 2.36 1998/05/04 19:36:53 frystyk Exp $
2.15 frystyk 7: **
2.1 frystyk 8: ** This module implements the output stream for MIME used for sending
2.10 frystyk 9: ** requests with a entity body to HTTP, NEWS, etc. or for generating
10: ** responses
2.1 frystyk 11: **
12: ** History:
13: ** Jan 95 HFN Written
14: */
15:
16: /* Library Includes */
2.36 frystyk 17: #include "wwwsys.h"
2.21 frystyk 18: #include "WWWUtil.h"
19: #include "WWWCore.h"
2.7 frystyk 20: #include "HTAncMan.h"
2.1 frystyk 21: #include "HTNetMan.h"
2.21 frystyk 22: #include "HTReqMan.h"
2.2 frystyk 23: #include "HTHeader.h"
2.21 frystyk 24: #include "HTMIMERq.h" /* Implements */
2.1 frystyk 25:
2.17 frystyk 26: #define PUTC(c) (*me->target->isa->put_character)(me->target, c)
27: #define PUTS(s) (*me->target->isa->put_string)(me->target, s)
2.1 frystyk 28: #define PUTBLOCK(b, l) (*me->target->isa->put_block)(me->target, b, l)
29:
30: struct _HTStream {
2.14 frystyk 31: const HTStreamClass * isa;
2.1 frystyk 32: HTStream * target;
33: HTRequest * request;
2.10 frystyk 34: BOOL endHeader;
2.1 frystyk 35: BOOL transparent;
36: };
37:
2.27 frystyk 38: #define HT_MAX_WAIT 8 /* Max number of secs to wait for PUT */
2.25 frystyk 39:
2.32 frystyk 40: PRIVATE int MIMERequest_put_block (HTStream * me, const char * b, int l);
41:
2.1 frystyk 42: /* ------------------------------------------------------------------------- */
43: /* MIME Output Request Stream */
44: /* ------------------------------------------------------------------------- */
45:
46: /* MIMEMakeRequest
47: ** ---------------
2.10 frystyk 48: ** Generates the BODY parts of a MIME message.
2.1 frystyk 49: */
2.2 frystyk 50: PRIVATE int MIMEMakeRequest (HTStream * me, HTRequest * request)
2.1 frystyk 51: {
2.17 frystyk 52: char crlf[3];
2.10 frystyk 53: char linebuf[256]; /* @@@ */
2.21 frystyk 54: HTParentAnchor * entity = HTRequest_entityAnchor(request);
55: HTEnHd EntityMask = HTRequest_enHd(request);
2.34 frystyk 56: BOOL transfer_coding = NO; /* We should get this from the Host object */
2.17 frystyk 57: *crlf = CR; *(crlf+1) = LF; *(crlf+2) = '\0';
2.1 frystyk 58:
2.21 frystyk 59: if (EntityMask & HT_E_ALLOW) {
2.34 frystyk 60: BOOL first = YES;
61: int cnt;
62: HTMethod methodset = HTAnchor_allow(entity);
63: for (cnt=0; cnt<sizeof(HTMethod)<<3 ; cnt++) {
64: if (methodset & (1<<cnt)) {
65: if (first) {
66: PUTS("Allow: ");
67: first = NO;
68: } else
69: PUTC(',');
70: PUTS(HTMethod_name(1<<cnt));
71: }
72: }
73: if (!first) PUTBLOCK(crlf, 2);
2.10 frystyk 74: }
2.35 frystyk 75: if (EntityMask & HT_E_CONTENT_ENCODING && entity->content_encoding) {
2.17 frystyk 76: BOOL first = YES;
77: HTList * cur = entity->content_encoding;
78: HTEncoding pres;
2.35 frystyk 79: while ((pres = (HTEncoding) HTList_nextObject(cur)) &&
80: !HTFormat_isUnityContent(pres)) {
2.17 frystyk 81: if (first) {
82: PUTS("Content-Encoding: ");
83: first = NO;
84: } else
85: PUTC(',');
86: PUTS(HTAtom_name(pres));
87: }
88: if (!first) PUTBLOCK(crlf, 2);
2.1 frystyk 89: }
2.34 frystyk 90: if (EntityMask & HT_E_CTE && entity->cte) {
91: HTEncoding cte = HTAnchor_contentTransferEncoding(entity);
92: if (!HTFormat_isUnityTransfer(cte)) {
93: sprintf(linebuf, "Content-Transfer-Encoding: %s%c%c",
94: HTAtom_name(cte), CR, LF);
95: PUTBLOCK(linebuf, (int) strlen(linebuf));
96: }
97: }
2.21 frystyk 98: if (EntityMask & HT_E_CONTENT_LANGUAGE && entity->content_language){
2.17 frystyk 99: BOOL first = YES;
100: HTList * cur = entity->content_language;
101: HTLanguage pres;
102: while ((pres = (HTLanguage) HTList_nextObject(cur))) {
103: if (first) {
104: PUTS("Content-Language: ");
105: first = NO;
106: } else
107: PUTC(',');
108: PUTS(HTAtom_name(pres));
109: }
110: if (!first) PUTBLOCK(crlf, 2);
2.1 frystyk 111: }
2.34 frystyk 112:
113: /* Only send out Content-Length if we don't have a transfer coding */
114: if (!HTRequest_transfer(request)) {
115: if (EntityMask & HT_E_CONTENT_LENGTH) {
116: if (entity->content_length >= 0) {
117: sprintf(linebuf, "Content-Length: %ld%c%c",
118: entity->content_length, CR, LF);
119: PUTBLOCK(linebuf, (int) strlen(linebuf));
120: } else {
121: transfer_coding = YES;
122: }
2.20 frystyk 123: }
2.1 frystyk 124: }
2.33 frystyk 125: if (EntityMask & HT_E_CONTENT_TYPE && entity->content_type) {
126: HTFormat format = entity->content_type != WWW_UNKNOWN ?
127: entity->content_type : WWW_BINARY;
2.19 frystyk 128: HTAssocList * parameters = HTAnchor_formatParam(entity);
129:
130: /* Output the content type */
131: PUTS("Content-Type: ");
2.33 frystyk 132: PUTS(HTAtom_name(format));
2.19 frystyk 133:
134: /* Add all parameters */
135: if (parameters) {
136: HTAssoc * pres;
137: while ((pres = (HTAssoc *) HTAssocList_nextObject(parameters))) {
138: PUTS(";");
139: PUTS(HTAssoc_name(pres));
140: PUTS("=");
141: PUTS(HTAssoc_value(pres));
142: }
143: }
144: PUTBLOCK(crlf, 2);
2.10 frystyk 145: }
2.21 frystyk 146: if (EntityMask & HT_E_DERIVED_FROM && entity->derived_from) {
2.10 frystyk 147: sprintf(linebuf, "Derived-From: %s%c%c", entity->derived_from,
148: CR, LF);
2.2 frystyk 149: PUTBLOCK(linebuf, (int) strlen(linebuf));
2.1 frystyk 150: }
2.21 frystyk 151: if (EntityMask & HT_E_EXPIRES) {
2.10 frystyk 152: if (entity->expires != -1) {
153: sprintf(linebuf, "Expires: %s%c%c",
154: HTDateTimeStr(&entity->expires, NO), CR,LF);
2.2 frystyk 155: PUTBLOCK(linebuf, (int) strlen(linebuf));
2.1 frystyk 156: }
2.10 frystyk 157: }
2.21 frystyk 158: if (EntityMask & HT_E_LAST_MODIFIED) {
2.10 frystyk 159: if (entity->last_modified != -1) {
160: sprintf(linebuf, "Last-Modified: %s%c%c",
161: HTDateTimeStr(&entity->last_modified, NO), CR,LF);
2.2 frystyk 162: PUTBLOCK(linebuf, (int) strlen(linebuf));
2.1 frystyk 163: }
2.10 frystyk 164: }
2.37 ! frystyk 165: if (EntityMask & HT_E_LINK) {
! 166: HTLink * link = HTAnchor_mainLink((HTAnchor *) entity);
! 167: HTList * sublinks = HTAnchor_subLinks((HTAnchor *) entity);
! 168: HTLinkType linktype = NULL;
! 169:
! 170: /* First look in the main link */
! 171: if (link && (linktype = HTLink_type(link))) {
! 172: char * src = HTAnchor_address((HTAnchor *) entity);
! 173: HTParentAnchor * dest = HTAnchor_parent(HTLink_destination(link));
! 174: char * dst = HTAnchor_address((HTAnchor *) dest);
! 175: char * rel_dst = HTRelative(src, dst);
! 176: if (rel_dst) {
! 177: PUTS("Link: <");
! 178: PUTS(rel_dst);
! 179: PUTS(">");
! 180: sprintf(linebuf, ";rel=\"%s\"", HTAtom_name(linktype));
! 181: PUTBLOCK(linebuf, (int) strlen(linebuf));
! 182: HT_FREE(rel_dst);
! 183: HT_FREE(dst);
! 184: }
2.1 frystyk 185:
2.37 ! frystyk 186: /* ... and then in any sublinks */
! 187: if (sublinks) {
! 188: HTLink * pres;
! 189: while ((pres = (HTLink *) HTList_nextObject(sublinks))) {
! 190: if ((linktype = HTLink_type(pres))) {
! 191: dest = HTAnchor_parent(HTLink_destination(pres));
! 192: dst = HTAnchor_address((HTAnchor *) dest);
! 193: rel_dst = HTRelative(src, dst);
! 194: if (rel_dst) {
! 195: PUTS(", <");
! 196: PUTS(rel_dst);
! 197: PUTS(">");
! 198: sprintf(linebuf, ";rel=\"%s\"", HTAtom_name(linktype));
! 199: PUTBLOCK(linebuf, (int) strlen(linebuf));
! 200: HT_FREE(rel_dst);
! 201: HT_FREE(dst);
! 202: }
! 203: }
! 204: }
! 205: }
! 206: PUTBLOCK(crlf, 2);
! 207: HT_FREE(src);
! 208: }
2.10 frystyk 209: }
2.37 ! frystyk 210: if (EntityMask & HT_E_TITLE && entity->title) {
! 211: sprintf(linebuf, "Title: %s%c%c", entity->title, CR, LF);
! 212: PUTBLOCK(linebuf, (int) strlen(linebuf));
2.10 frystyk 213: }
2.21 frystyk 214: if (EntityMask & HT_E_URI) { /* @@@@@@@@@@ */
2.1 frystyk 215:
216: }
2.21 frystyk 217: if (EntityMask & HT_E_VERSION && entity->version) {
2.37 ! frystyk 218: sprintf(linebuf, "Content-Version: %s%c%c", entity->version, CR, LF);
2.10 frystyk 219: PUTBLOCK(linebuf, (int) strlen(linebuf));
220: }
221: if (me->endHeader) {
222: sprintf(linebuf, "%c%c", CR, LF); /* Blank line means "end" */
223: PUTBLOCK(linebuf, (int) strlen(linebuf));
2.2 frystyk 224: }
2.20 frystyk 225:
226: /*
2.34 frystyk 227: ** Handle any Transfer encoding. This is really a transport issue but
228: ** as it often pops up when we are sending an entity then we put it
229: ** here for now. A better place whould be in the HTTPGen stream.
230: ** the real problem is that the server doesn't have any mechanism of
231: ** telling the client what transports it can handle. The best we can
232: ** hope for is that the server understands "chunked" although we are
233: ** certainly capable of handling nested encodings :(
234: */
235: if (transfer_coding) {
236: HTStream * target = HTTransferCodingStack(WWW_CODING_CHUNKED,
237: me->target, request, NULL, NO);
238: if (STREAM_TRACE) HTTrace("Building.... Transfer-Encoding stack\n");
239: if (target == HTBlackHole()) {
240: if (me->target) (*me->target->isa->abort)(me->target, NULL);
241: me->target = HTErrorStream();
242: } else
243: me->target = target;
244: }
245:
246: #if 0
247: /*
248: ** We expect the anchor object already to have the right encoding and
249: ** we therefore should not set up extra streams for doing this.
2.20 frystyk 250: */
251:
2.34 frystyk 252: /* Handle any Content Transfer encoding */
2.20 frystyk 253: {
2.34 frystyk 254: HTEncoding cte = HTAnchor_contentTransferEncoding(entity);
255: if (!HTFormat_isUnityTransfer(cte)) {
2.20 frystyk 256: if (STREAM_TRACE) HTTrace("Building.... C-T-E stack\n");
2.34 frystyk 257: me->target = HTContentTransferCodingStack(cte, me->target,
258: request, NULL, YES);
2.20 frystyk 259: }
260: }
261:
2.34 frystyk 262: /* Handle any Content Encodings */
2.20 frystyk 263: {
264: HTList * cc = HTAnchor_encoding(entity);
265: if (cc) {
266: if (STREAM_TRACE) HTTrace("Building.... C-E stack\n");
2.33 frystyk 267: me->target = HTContentEncodingStack(cc, me->target, request, NULL);
2.20 frystyk 268: }
269: }
2.34 frystyk 270: #endif
2.20 frystyk 271:
2.13 eric 272: if (PROT_TRACE) HTTrace("MIME........ Generating Entity Headers\n");
2.2 frystyk 273: return HT_OK;
2.1 frystyk 274: }
275:
2.32 frystyk 276: /*
277: ** Flushes header but doesn't free stream object
278: */
279: PRIVATE int MIMERequest_flush (HTStream * me)
280: {
281: int status = MIMERequest_put_block(me, NULL, 0);
282: return status==HT_OK ? (*me->target->isa->flush)(me->target) : status;
283: }
284:
2.14 frystyk 285: PRIVATE int MIMERequest_put_block (HTStream * me, const char * b, int l)
2.1 frystyk 286: {
2.23 frystyk 287: HTNet * net = HTRequest_net(me->request);
2.32 frystyk 288: if (!me->transparent) {
2.1 frystyk 289: MIMEMakeRequest(me, me->request);
2.9 frystyk 290: me->transparent = YES;
2.22 frystyk 291:
292: /*
2.32 frystyk 293: ** First we only send the header
2.22 frystyk 294: */
295: if (HTMethod_hasEntity(HTRequest_method(me->request))) {
296: HTHost * host = HTNet_host(net);
297: char * class = HTHost_class(host);
2.23 frystyk 298: if (class && !strcmp(class, "http")) {
2.32 frystyk 299: MIMERequest_flush(me);
300: return HT_PAUSE;
2.22 frystyk 301: }
302: }
2.1 frystyk 303: }
2.32 frystyk 304:
2.23 frystyk 305: /* Check if we have written it all */
306: if (b) {
307: HTParentAnchor * entity = HTRequest_entityAnchor(me->request);
308: long cl = HTAnchor_length(entity);
309: return (cl>=0 && HTNet_bytesWritten(net) >= cl) ?
310: HT_LOADED : PUTBLOCK(b, l);
311: }
312: return HT_OK;
2.1 frystyk 313: }
314:
315: PRIVATE int MIMERequest_put_character (HTStream * me, char c)
316: {
317: return MIMERequest_put_block(me, &c, 1);
318: }
319:
2.14 frystyk 320: PRIVATE int MIMERequest_put_string (HTStream * me, const char * s)
2.1 frystyk 321: {
322: return MIMERequest_put_block(me, s, strlen(s));
323: }
324:
325: /*
326: ** Flushes data and frees stream object
327: */
328: PRIVATE int MIMERequest_free (HTStream * me)
329: {
330: int status = MIMERequest_flush(me);
331: if (status != HT_WOULD_BLOCK) {
332: if ((status = (*me->target->isa->_free)(me->target)) == HT_WOULD_BLOCK)
333: return HT_WOULD_BLOCK;
2.12 frystyk 334: HT_FREE(me);
2.1 frystyk 335: }
336: return status;
337: }
338:
2.4 frystyk 339: PRIVATE int MIMERequest_abort (HTStream * me, HTList * e)
2.1 frystyk 340: {
341: if (me->target) (*me->target->isa->abort)(me->target, e);
2.12 frystyk 342: HT_FREE(me);
2.13 eric 343: if (PROT_TRACE) HTTrace("MIMERequest. ABORTING...\n");
2.1 frystyk 344: return HT_ERROR;
345: }
346:
347: /* MIMERequest Stream
348: ** -----------------
349: */
2.14 frystyk 350: PRIVATE const HTStreamClass MIMERequestClass =
2.1 frystyk 351: {
352: "MIMERequest",
353: MIMERequest_flush,
354: MIMERequest_free,
355: MIMERequest_abort,
356: MIMERequest_put_character,
357: MIMERequest_put_string,
358: MIMERequest_put_block
359: };
360:
2.10 frystyk 361: PUBLIC HTStream * HTMIMERequest_new (HTRequest * request, HTStream * target,
362: BOOL endHeader)
2.1 frystyk 363: {
2.12 frystyk 364: HTStream * me;
365: if ((me = (HTStream *) HT_CALLOC(1, sizeof(HTStream))) == NULL)
366: HT_OUTOFMEM("HTMIMERequest_new");
2.1 frystyk 367: me->isa = &MIMERequestClass;
368: me->target = target;
369: me->request = request;
2.10 frystyk 370: me->endHeader = endHeader;
2.1 frystyk 371: me->transparent = NO;
372: return me;
373: }
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