Annotation of parser3/src/types/pa_vform.C, revision 1.74.2.9
1.27 paf 1: /** @file
2: Parser: @b form class.
1.10 paf 3:
1.74.2.3 paf 4: Copyright(c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com)
1.52 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.39 parser 6:
1.38 parser 7: based on The CGI_C library, by Thomas Boutell.
1.3 paf 8: */
1.59 paf 9:
1.74.2.9! paf 10: static const char* IDENT_VFORM_C="$Date: 2003/02/17 17:05:04 $";
1.3 paf 11:
1.14 paf 12: #include "pa_sapi.h"
1.1 paf 13: #include "pa_vform.h"
14: #include "pa_vstring.h"
1.3 paf 15: #include "pa_globals.h"
16: #include "pa_request.h"
1.9 paf 17: #include "pa_vfile.h"
1.21 paf 18: #include "pa_common.h"
1.30 parser 19: #include "pa_vtable.h"
1.50 paf 20: #include "pa_charset.h"
1.3 paf 21:
1.62 paf 22: // defines
23:
24: //#define DEBUG_POST
25:
1.3 paf 26: // parse helper funcs
27:
1.74.2.3 paf 28: static size_t getHeader(const char* data, size_t len){
1.25 paf 29: size_t i;
30: int enter=-1;
1.3 paf 31: if (data)
1.62 paf 32: for (i=0;i<len;i++)
33: if (data[i]=='\n'){
34: if (enter>=0) enter++;
35: if (enter>1) return i;
36: } else if (data[i]!='\r') enter=0;
37: return 0;
1.3 paf 38: }
39:
1.74.2.3 paf 40: static const char* searchAttribute(const char* data,
41: const char* attr, //< expected to be lowercased
1.62 paf 42: size_t len){
1.16 paf 43: size_t i;
1.3 paf 44: if (data)
1.62 paf 45: for (i=0;i<len;i++)
46: if (tolower(data[i])==*attr){
47: size_t j;
48: for (j=i+1;j<=len;j++)
49: if (!attr[j-i]) return &data[j];
50: else {
51: if (j==len) break;
52: if (attr[j-i]!=tolower(data[j])) break;
53: }
54: }
55:
56: return NULL;
1.3 paf 57: }
58:
59: // VForm
60:
1.74.2.5 paf 61: extern MethodedPtr form_base_class;
1.57 paf 62:
1.74.2.8 paf 63: VForm::VForm(): VStateless_class(StringPtr(0), form_base_class.get()),
64: fpool(0),
65: fcharsets(0),
66: filled(false) {
67: }
1.50 paf 68:
1.74.2.3 paf 69: char *VForm::strpart(const char* str, size_t len) {
1.74.2.9! paf 70: char *result=new(*fpool) char[len+1];
1.18 paf 71: memcpy(result, str, len);
1.3 paf 72: result[len]=0;
73: return result;
74: }
75:
1.74.2.3 paf 76: char *VForm::getAttributeValue(const char* data, char *attr, size_t len) {
77: const char* value=searchAttribute(data, attr, len);
1.3 paf 78: if (value){
1.18 paf 79: size_t i;
80: if (!(len-=value-data)) return NULL;
81: if (*value=='"') {
82: for (i=1;i<len;i++) if (value[i]=='"') break;
83: return strpart(&value[1], i-1);
84: } else {
85: for (i=0;i<len;i++) if (strchr(" ;\"\n\r", value[i])) break;
86: return strpart(value, i);
87: }
1.3 paf 88: }
89: return NULL;
90: }
91:
1.49 paf 92: void VForm::transcode(
93: const void *client_body, size_t client_content_length,
94: const void *& source_body, size_t& source_content_length) {
1.74.2.4 paf 95: Charset::transcode(*fpool,
96: fcharsets->client(), client_body, client_content_length,
97: fcharsets->source(), source_body, source_content_length);
1.49 paf 98: }
99:
1.74.2.3 paf 100: void VForm::ParseGetFormInput(const char* query_string, size_t length) {
1.42 parser 101: ParseFormInput(query_string, length);
1.3 paf 102: }
103:
1.69 paf 104:
1.74.2.3 paf 105: static int atoi(const char* data, size_t alength) {
1.69 paf 106: char buf[MAX_STRING];
107: size_t length=min((int)alength, MAX_STRING-1);
108: strncpy(buf, data, length);
109: return atoi(buf);
110: }
1.74.2.3 paf 111: void VForm::ParseFormInput(const char* data, size_t length) {
1.68 paf 112: // cut out ?image_map_tail
113: {
1.67 paf 114: for(size_t pos=0; pos<length; pos++) {
115: if(data[pos]=='?') {
1.69 paf 116: size_t start=pos+1;
117: size_t aftercomma=start;
118: size_t lookingcomma=start;
119: for(; lookingcomma<length; lookingcomma++) {
120: if(data[lookingcomma]==',') {
121: aftercomma=++lookingcomma;
122: break;
123: }
124: }
125:
126: if(aftercomma>start) { // ?x,y
127: int x=atoi(data+start, aftercomma-1-start);
128: int y=atoi(data+aftercomma, length-aftercomma);
1.74.2.4 paf 129: imap.put(StringPtr(new String("x")), ValuePtr(new VInt(x)));
130: imap.put(StringPtr(new String("y")), ValuePtr(new VInt(y)));
1.69 paf 131: } else { // ?qtail
132: AppendFormEntry("qtail", data+start, length-start);
133: }
1.67 paf 134: // cut tail
135: length=pos;
136: break;
137: }
138: }
139: }
1.68 paf 140: // Scan for pairs, unescaping and storing them as they are found
141: for(size_t pos=0; pos<length; ) {
1.16 paf 142: size_t start=pos;
1.68 paf 143: size_t finish=length;
144: for(; pos<length; pos++) {
145: if(data[pos]=='&') {
146: finish=pos++;
1.3 paf 147: break;
148: }
149: }
1.68 paf 150:
151: size_t aftereq=start;
152: size_t lookingeq=start;
153: for(; lookingeq<finish; lookingeq++) {
154: if(data[lookingeq]=='=') {
155: aftereq=++lookingeq;
1.3 paf 156: break;
157: }
158: }
1.45 paf 159:
1.74.2.4 paf 160: const char* attr=aftereq>start?unescape_chars(*fpool, data+start, aftereq-1-start):"nameless";
161: char *value=unescape_chars(*fpool, data+aftereq, finish-aftereq);
1.68 paf 162: AppendFormEntry(attr, value, strlen(value));
1.3 paf 163: }
164: }
165:
1.62 paf 166: static char *pa_tolower(char *s) {
167: for(char *p=s; *p; p++)
168: *p=tolower(*p);
169: return s;
170: }
1.49 paf 171: void VForm::ParseMimeInput(
172: char *content_type,
1.74.2.3 paf 173: const char* data, size_t length) {
1.3 paf 174: /* Scan for mime-presented pairs, storing them as they are found. */
175: const char
1.62 paf 176: *boundary=pa_tolower(getAttributeValue(content_type, "boundary=", strlen(content_type))),
1.3 paf 177: *lastData=&data[length];
178: if(!boundary)
1.74.2.4 paf 179: throw Exception(Exception::undefined_type,
180: Exception::undefined_source,
1.3 paf 181: "VForm::ParseMimeInput no boundary attribute of Content-Type");
182:
183: while(true) {
1.66 paf 184: const char
1.18 paf 185: *dataStart=searchAttribute(data, boundary, lastData-data),
186: *dataEnd=searchAttribute(dataStart, boundary, lastData-dataStart);
187: size_t headerSize=getHeader(dataStart, lastData-dataStart);
1.3 paf 188:
189: if(!dataStart|!dataEnd|!headerSize) break;
1.47 paf 190: if(searchAttribute(dataStart, "content-disposition: form-data", headerSize)) {
1.16 paf 191: size_t valueSize=(dataEnd-dataStart)-headerSize-5-strlen(boundary);
1.18 paf 192: char *attr=getAttributeValue(dataStart, " name=", headerSize),
193: *fName=getAttributeValue(dataStart, " filename=", headerSize);
1.3 paf 194:
1.48 paf 195: if(attr && valueSize) {
1.3 paf 196: /* OK, we have a new pair, add it to the list. */
197: AppendFormEntry(attr, &dataStart[headerSize+1], valueSize, fName);
198: }
199: }
200: data=(dataEnd-strlen(boundary));
201: }
202: }
203:
1.49 paf 204: void VForm::AppendFormEntry(
1.74.2.3 paf 205: const char* cname_cstr,
206: const char* raw_cvalue_ptr, const size_t raw_cvalue_size,
1.74.2.4 paf 207: const char* copy_me_file_name_cstr) {
1.49 paf 208: const void *sname_ptr;
209: size_t sname_size;
210: transcode(
211: cname_cstr, strlen(cname_cstr),
212: sname_ptr, sname_size);
1.74.2.4 paf 213: StringPtr sname(new String((const char* )sname_ptr, sname_size));
1.3 paf 214:
1.74.2.4 paf 215: ValuePtr value;
216: if(copy_me_file_name_cstr) {
217: VFilePtr vfile(new VFile);
1.61 paf 218: // maybe transcode text/* files?
1.74.2.4 paf 219: StringPtr sfile_name(new String(fpool->copy(copy_me_file_name_cstr)));
1.74.2.7 paf 220: vfile->set(*fpool, true/*tainted*/, raw_cvalue_ptr, raw_cvalue_size, sfile_name->cstr(*fpool));
1.17 paf 221: value=vfile;
222: } else {
1.74.2.3 paf 223: const char* premature_zero_pos=(const char* )memchr(raw_cvalue_ptr, 0, raw_cvalue_size);
224: size_t cvalue_size=premature_zero_pos?premature_zero_pos-(const char* )raw_cvalue_ptr
1.73 paf 225: :raw_cvalue_size;
1.74.2.4 paf 226: char *cvalue_ptr=fpool->copy(raw_cvalue_ptr, cvalue_size);
1.49 paf 227: fix_line_breaks(cvalue_ptr, cvalue_size);
228:
229: const void *svalue_ptr; size_t svalue_size;
230: transcode(
231: cvalue_ptr, cvalue_size, // client [from]
232: svalue_ptr, svalue_size); // source [to]
1.47 paf 233:
1.74.2.4 paf 234: StringPtr string(new String);
235: string->APPEND_TAINTED((const char*)svalue_ptr, svalue_size, "form", 0);
1.36 parser 236:
237: // tables
238: {
1.74.2.4 paf 239: ValuePtr vtable=tables.get(sname);
240: if(!vtable) {
1.36 parser 241: // first appearence
1.74.2.4 paf 242: Table::columns_type columns(new Table::columns_type::element_type(1));
243: *columns+=StringPtr(new String("field"));
244:
245: vtable=ValuePtr(new VTable(TablePtr(new Table(Exception::undefined_source, columns))));
246: tables.put(sname, vtable);
1.30 parser 247: }
1.74.2.4 paf 248: Table& table=*vtable->get_table();
249:
1.30 parser 250: // this string becomes next row
1.74.2.6 paf 251: Table::element_type row(new ArrayString(1));
1.74.2.4 paf 252: *row+=string;
253: table+=row;
1.36 parser 254: }
1.74.2.4 paf 255: value=ValuePtr(new VString(string));
1.3 paf 256: }
1.69 paf 257:
258: fields.put_dont_replace(sname, value);
259: }
260:
1.74.2.4 paf 261: void VForm::fill_fields_and_tables(Pool& apool, Request_charsets& acharsets,
262: Request_info& request_info) {
263: fpool=&apool; fcharsets=&acharsets;
264: try{
265:
1.74.2.9! paf 266: request_info.query_string="a=123";
1.3 paf 267: // parsing QS [GET and ?name=value from uri rewrite)]
1.74.2.4 paf 268: if(request_info.query_string) {
269: size_t length=strlen(request_info.query_string);
1.74.2.9! paf 270: char *buf=apool.copy(request_info.query_string, length);
1.42 parser 271: ParseGetFormInput(buf, length);
272: }
1.62 paf 273:
274: #ifdef DEBUG_POST
1.74.2.4 paf 275: request_info.method="POST";
1.62 paf 276: void *data;
277: file_read(pool(), *NEW String(pool(), "opera.stdin"), //"ie.stdin"), //
278: data, request.post_size,
279: false/*as_text*/);
280: request.post_data=(char*)data;
1.74.2.4 paf 281: request_info.content_type="multipart/form-data; boundary=----------mcqY2UDNcdEAoN1mLmne2i";
282: //request_info.content_type="multipart/form-data; boundary=---------------------------7d23111f44403a4";
1.62 paf 283:
284: #endif
1.57 paf 285:
286: // parsing POST data
1.74.2.4 paf 287: if(request_info.method) {
288: if(const char* content_type=request_info.content_type)
289: if(StrEqNc(request_info.method, "post", true)) {
1.18 paf 290: if(StrEqNc(content_type, "application/x-www-form-urlencoded", true))
1.74.2.4 paf 291: ParseFormInput(request_info.post_data, request_info.post_size);
1.74.2.9! paf 292: else if(StrEqNc(content_type, "multipart/form-data", 0))
! 293: ParseMimeInput(apool.copy(content_type),
! 294: request_info.post_data, request_info.post_size);
1.3 paf 295: }
1.57 paf 296: }
1.56 paf 297:
298: filled=true;
1.74.2.4 paf 299:
300: fpool=0; fcharsets=0;
301: } catch(...) { fpool=0; fcharsets=0; }
1.1 paf 302: }
1.33 parser 303:
1.74.2.4 paf 304: ValuePtr VForm::get_element(StringPtr aname, Value& aself, bool looking_up) {
1.56 paf 305: if(!filled)
306: throw Exception("parser.runtime",
1.74.2.4 paf 307: aname,
1.56 paf 308: "not determined yet");
309:
1.36 parser 310: // $fields
1.74.2.4 paf 311: if(*aname==FORM_FIELDS_ELEMENT_NAME)
312: return ValuePtr(new VHash(fields));
1.36 parser 313:
314: // $tables
1.74.2.4 paf 315: if(*aname==FORM_TABLES_ELEMENT_NAME)
316: return ValuePtr(new VHash(tables));
1.69 paf 317:
1.74.2.4 paf 318: if(*aname==FORM_IMAP_ELEMENT_NAME)
319: return ValuePtr(new VHash(imap));
1.36 parser 320:
1.63 paf 321: // $method
1.74.2.4 paf 322: if(ValuePtr result=VStateless_class::get_element(aname, aself, looking_up))
1.33 parser 323: return result;
324:
325: // $element
1.74.2.4 paf 326: return fields.get(aname);
1.72 paf 327: }
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