Annotation of parser3/src/types/pa_vform.C, revision 1.74.2.5
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:
1.74.2.5! paf 10: static const char* IDENT_VFORM_C="$Date: 2003/02/03 10:39:08 $";
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:
1.74.2.5! paf 63: VForm::VForm(): VStateless_class(StringPtr(0), form_base_class.get()) {}
1.50 paf 64:
1.74.2.3 paf 65: char *VForm::strpart(const char* str, size_t len) {
1.7 paf 66: char *result=(char *)malloc(len+1);
1.3 paf 67: if (!result) return NULL;
1.18 paf 68: memcpy(result, str, len);
1.3 paf 69: result[len]=0;
70: return result;
71: }
72:
1.74.2.3 paf 73: char *VForm::getAttributeValue(const char* data, char *attr, size_t len) {
74: const char* value=searchAttribute(data, attr, len);
1.3 paf 75: if (value){
1.18 paf 76: size_t i;
77: if (!(len-=value-data)) return NULL;
78: if (*value=='"') {
79: for (i=1;i<len;i++) if (value[i]=='"') break;
80: return strpart(&value[1], i-1);
81: } else {
82: for (i=0;i<len;i++) if (strchr(" ;\"\n\r", value[i])) break;
83: return strpart(value, i);
84: }
1.3 paf 85: }
86: return NULL;
87: }
88:
1.49 paf 89: void VForm::transcode(
90: const void *client_body, size_t client_content_length,
91: const void *& source_body, size_t& source_content_length) {
1.74.2.4 paf 92: Charset::transcode(*fpool,
93: fcharsets->client(), client_body, client_content_length,
94: fcharsets->source(), source_body, source_content_length);
1.49 paf 95: }
96:
1.74.2.3 paf 97: void VForm::ParseGetFormInput(const char* query_string, size_t length) {
1.42 parser 98: ParseFormInput(query_string, length);
1.3 paf 99: }
100:
1.69 paf 101:
1.74.2.3 paf 102: static int atoi(const char* data, size_t alength) {
1.69 paf 103: char buf[MAX_STRING];
104: size_t length=min((int)alength, MAX_STRING-1);
105: strncpy(buf, data, length);
106: return atoi(buf);
107: }
1.74.2.3 paf 108: void VForm::ParseFormInput(const char* data, size_t length) {
1.68 paf 109: // cut out ?image_map_tail
110: {
1.67 paf 111: for(size_t pos=0; pos<length; pos++) {
112: if(data[pos]=='?') {
1.69 paf 113: size_t start=pos+1;
114: size_t aftercomma=start;
115: size_t lookingcomma=start;
116: for(; lookingcomma<length; lookingcomma++) {
117: if(data[lookingcomma]==',') {
118: aftercomma=++lookingcomma;
119: break;
120: }
121: }
122:
123: if(aftercomma>start) { // ?x,y
124: int x=atoi(data+start, aftercomma-1-start);
125: int y=atoi(data+aftercomma, length-aftercomma);
1.74.2.4 paf 126: imap.put(StringPtr(new String("x")), ValuePtr(new VInt(x)));
127: imap.put(StringPtr(new String("y")), ValuePtr(new VInt(y)));
1.69 paf 128: } else { // ?qtail
129: AppendFormEntry("qtail", data+start, length-start);
130: }
1.67 paf 131: // cut tail
132: length=pos;
133: break;
134: }
135: }
136: }
1.68 paf 137: // Scan for pairs, unescaping and storing them as they are found
138: for(size_t pos=0; pos<length; ) {
1.16 paf 139: size_t start=pos;
1.68 paf 140: size_t finish=length;
141: for(; pos<length; pos++) {
142: if(data[pos]=='&') {
143: finish=pos++;
1.3 paf 144: break;
145: }
146: }
1.68 paf 147:
148: size_t aftereq=start;
149: size_t lookingeq=start;
150: for(; lookingeq<finish; lookingeq++) {
151: if(data[lookingeq]=='=') {
152: aftereq=++lookingeq;
1.3 paf 153: break;
154: }
155: }
1.45 paf 156:
1.74.2.4 paf 157: const char* attr=aftereq>start?unescape_chars(*fpool, data+start, aftereq-1-start):"nameless";
158: char *value=unescape_chars(*fpool, data+aftereq, finish-aftereq);
1.68 paf 159: AppendFormEntry(attr, value, strlen(value));
1.3 paf 160: }
161: }
162:
1.62 paf 163: static char *pa_tolower(char *s) {
164: for(char *p=s; *p; p++)
165: *p=tolower(*p);
166: return s;
167: }
1.49 paf 168: void VForm::ParseMimeInput(
169: char *content_type,
1.74.2.3 paf 170: const char* data, size_t length) {
1.3 paf 171: /* Scan for mime-presented pairs, storing them as they are found. */
172: const char
1.62 paf 173: *boundary=pa_tolower(getAttributeValue(content_type, "boundary=", strlen(content_type))),
1.3 paf 174: *lastData=&data[length];
175: if(!boundary)
1.74.2.4 paf 176: throw Exception(Exception::undefined_type,
177: Exception::undefined_source,
1.3 paf 178: "VForm::ParseMimeInput no boundary attribute of Content-Type");
179:
180: while(true) {
1.66 paf 181: const char
1.18 paf 182: *dataStart=searchAttribute(data, boundary, lastData-data),
183: *dataEnd=searchAttribute(dataStart, boundary, lastData-dataStart);
184: size_t headerSize=getHeader(dataStart, lastData-dataStart);
1.3 paf 185:
186: if(!dataStart|!dataEnd|!headerSize) break;
1.47 paf 187: if(searchAttribute(dataStart, "content-disposition: form-data", headerSize)) {
1.16 paf 188: size_t valueSize=(dataEnd-dataStart)-headerSize-5-strlen(boundary);
1.18 paf 189: char *attr=getAttributeValue(dataStart, " name=", headerSize),
190: *fName=getAttributeValue(dataStart, " filename=", headerSize);
1.3 paf 191:
1.48 paf 192: if(attr && valueSize) {
1.3 paf 193: /* OK, we have a new pair, add it to the list. */
194: AppendFormEntry(attr, &dataStart[headerSize+1], valueSize, fName);
195: }
196: }
197: data=(dataEnd-strlen(boundary));
198: }
199: }
200:
1.49 paf 201: void VForm::AppendFormEntry(
1.74.2.3 paf 202: const char* cname_cstr,
203: const char* raw_cvalue_ptr, const size_t raw_cvalue_size,
1.74.2.4 paf 204: const char* copy_me_file_name_cstr) {
1.49 paf 205: const void *sname_ptr;
206: size_t sname_size;
207: transcode(
208: cname_cstr, strlen(cname_cstr),
209: sname_ptr, sname_size);
1.74.2.4 paf 210: StringPtr sname(new String((const char* )sname_ptr, sname_size));
1.3 paf 211:
1.74.2.4 paf 212: ValuePtr value;
213: if(copy_me_file_name_cstr) {
214: VFilePtr vfile(new VFile);
1.61 paf 215: // maybe transcode text/* files?
1.74.2.4 paf 216: StringPtr sfile_name(new String(fpool->copy(copy_me_file_name_cstr)));
217: vfile->set(*fpool, true/*tainted*/, raw_cvalue_ptr, raw_cvalue_size, sfile_name);
1.17 paf 218: value=vfile;
219: } else {
1.74.2.3 paf 220: const char* premature_zero_pos=(const char* )memchr(raw_cvalue_ptr, 0, raw_cvalue_size);
221: size_t cvalue_size=premature_zero_pos?premature_zero_pos-(const char* )raw_cvalue_ptr
1.73 paf 222: :raw_cvalue_size;
1.74.2.4 paf 223: char *cvalue_ptr=fpool->copy(raw_cvalue_ptr, cvalue_size);
1.49 paf 224: fix_line_breaks(cvalue_ptr, cvalue_size);
225:
226: const void *svalue_ptr; size_t svalue_size;
227: transcode(
228: cvalue_ptr, cvalue_size, // client [from]
229: svalue_ptr, svalue_size); // source [to]
1.47 paf 230:
1.74.2.4 paf 231: StringPtr string(new String);
232: string->APPEND_TAINTED((const char*)svalue_ptr, svalue_size, "form", 0);
1.36 parser 233:
234: // tables
235: {
1.74.2.4 paf 236: ValuePtr vtable=tables.get(sname);
237: if(!vtable) {
1.36 parser 238: // first appearence
1.74.2.4 paf 239: Table::columns_type columns(new Table::columns_type::element_type(1));
240: *columns+=StringPtr(new String("field"));
241:
242: vtable=ValuePtr(new VTable(TablePtr(new Table(Exception::undefined_source, columns))));
243: tables.put(sname, vtable);
1.30 parser 244: }
1.74.2.4 paf 245: Table& table=*vtable->get_table();
246:
1.30 parser 247: // this string becomes next row
1.74.2.4 paf 248: Table::element_type row(new Array<StringPtr>(1));
249: *row+=string;
250: table+=row;
1.36 parser 251: }
1.74.2.4 paf 252: value=ValuePtr(new VString(string));
1.3 paf 253: }
1.69 paf 254:
255: fields.put_dont_replace(sname, value);
256: }
257:
1.74.2.4 paf 258: void VForm::fill_fields_and_tables(Pool& apool, Request_charsets& acharsets,
259: Request_info& request_info) {
260: fpool=&apool; fcharsets=&acharsets;
261: try{
262:
1.3 paf 263: // parsing QS [GET and ?name=value from uri rewrite)]
1.74.2.4 paf 264: if(request_info.query_string) {
265: size_t length=strlen(request_info.query_string);
1.42 parser 266: char *buf=(char *)malloc(length);
1.74.2.4 paf 267: memcpy(buf, request_info.query_string, length);
1.42 parser 268: ParseGetFormInput(buf, length);
269: }
1.62 paf 270:
271: #ifdef DEBUG_POST
1.74.2.4 paf 272: request_info.method="POST";
1.62 paf 273: void *data;
274: file_read(pool(), *NEW String(pool(), "opera.stdin"), //"ie.stdin"), //
275: data, request.post_size,
276: false/*as_text*/);
277: request.post_data=(char*)data;
1.74.2.4 paf 278: request_info.content_type="multipart/form-data; boundary=----------mcqY2UDNcdEAoN1mLmne2i";
279: //request_info.content_type="multipart/form-data; boundary=---------------------------7d23111f44403a4";
1.62 paf 280:
281: #endif
1.57 paf 282:
283: // parsing POST data
1.74.2.4 paf 284: if(request_info.method) {
285: if(const char* content_type=request_info.content_type)
286: if(StrEqNc(request_info.method, "post", true)) {
1.18 paf 287: if(StrEqNc(content_type, "application/x-www-form-urlencoded", true))
1.74.2.4 paf 288: ParseFormInput(request_info.post_data, request_info.post_size);
1.42 parser 289: else if(StrEqNc(content_type, "multipart/form-data", 0)) {
290: size_t length=strlen(content_type)+1;
291: char *buf=(char *)malloc(length);
292: memcpy(buf, content_type, length);
1.74.2.4 paf 293: ParseMimeInput(buf, request_info.post_data, request_info.post_size);
1.42 parser 294: }
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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