Annotation of parser3/src/types/pa_vform.C, revision 1.87
1.27 paf 1: /** @file
2: Parser: @b form class.
1.10 paf 3:
1.84 paf 4: Copyright(c) 2001-2005 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:
1.87 ! misha 10: static const char * const IDENT_VFORM_C="$Date: 2007/04/20 08:36:10 $";
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"
1.86 misha 21: //#include "pa_charsets.h"
1.3 paf 22:
1.62 paf 23: // defines
24:
25: //#define DEBUG_POST
26:
1.3 paf 27: // parse helper funcs
28:
1.75 paf 29: static size_t getHeader(const char* data, size_t len){
1.25 paf 30: size_t i;
31: int enter=-1;
1.3 paf 32: if (data)
1.62 paf 33: for (i=0;i<len;i++)
34: if (data[i]=='\n'){
35: if (enter>=0) enter++;
36: if (enter>1) return i;
37: } else if (data[i]!='\r') enter=0;
38: return 0;
1.3 paf 39: }
40:
1.75 paf 41: static const char* searchAttribute(const char* data,
42: const char* attr, //< expected to be lowercased
1.62 paf 43: size_t len){
1.16 paf 44: size_t i;
1.3 paf 45: if (data)
1.62 paf 46: for (i=0;i<len;i++)
1.83 paf 47: if (tolower((unsigned char)data[i])==*attr){
1.62 paf 48: size_t j;
49: for (j=i+1;j<=len;j++)
50: if (!attr[j-i]) return &data[j];
51: else {
52: if (j==len) break;
1.83 paf 53: if (attr[j-i]!=tolower((unsigned char)data[j])) break;
1.62 paf 54: }
55: }
56:
57: return NULL;
1.3 paf 58: }
59:
60: // VForm
61:
1.75 paf 62: extern Methoded* form_base_class;
1.57 paf 63:
1.77 paf 64: VForm::VForm(Request_charsets& acharsets, Request_info& arequest_info): VStateless_class(0, form_base_class),
65: fcharsets(acharsets),
66: frequest_info(arequest_info),
67: filled_source(0),
68: filled_client(0) {
1.50 paf 69: }
70:
1.75 paf 71: char *VForm::strpart(const char* str, size_t len) {
72: char *result=new(PointerFreeGC) char[len+1];
1.18 paf 73: memcpy(result, str, len);
1.3 paf 74: result[len]=0;
75: return result;
76: }
77:
1.75 paf 78: char *VForm::getAttributeValue(const char* data, char *attr, size_t len) {
79: const char* value=searchAttribute(data, attr, len);
1.3 paf 80: if (value){
1.18 paf 81: size_t i;
82: if (!(len-=value-data)) return NULL;
83: if (*value=='"') {
84: for (i=1;i<len;i++) if (value[i]=='"') break;
85: return strpart(&value[1], i-1);
86: } else {
87: for (i=0;i<len;i++) if (strchr(" ;\"\n\r", value[i])) break;
88: return strpart(value, i);
89: }
1.3 paf 90: }
91: return NULL;
92: }
93:
1.75 paf 94: String::C VForm::transcode(const char* client, size_t client_size) {
95: return Charset::transcode(
96: String::C(strdup(client, client_size), client_size),
1.77 paf 97: fcharsets.client(),
98: fcharsets.source());
1.49 paf 99: }
100:
1.75 paf 101: void VForm::ParseGetFormInput(const char* query_string, size_t length) {
1.42 parser 102: ParseFormInput(query_string, length);
1.3 paf 103: }
104:
1.69 paf 105:
1.75 paf 106: static int atoi(const char* data, size_t alength) {
1.69 paf 107: char buf[MAX_STRING];
1.82 paf 108: size_t length=min(alength, sizeof(buf)-1);
109: memcpy(buf, data, length); buf[length]=0;
1.69 paf 110: return atoi(buf);
111: }
1.75 paf 112: void VForm::ParseFormInput(const char* data, size_t length) {
1.68 paf 113: // cut out ?image_map_tail
114: {
1.67 paf 115: for(size_t pos=0; pos<length; pos++) {
116: if(data[pos]=='?') {
1.69 paf 117: size_t start=pos+1;
118: size_t aftercomma=start;
119: size_t lookingcomma=start;
120: for(; lookingcomma<length; lookingcomma++) {
121: if(data[lookingcomma]==',') {
122: aftercomma=++lookingcomma;
123: break;
124: }
125: }
126:
127: if(aftercomma>start) { // ?x,y
128: int x=atoi(data+start, aftercomma-1-start);
129: int y=atoi(data+aftercomma, length-aftercomma);
1.75 paf 130: imap.put(String("x"), new VInt(x));
131: imap.put(String("y"), new VInt(y));
1.69 paf 132: } else { // ?qtail
133: AppendFormEntry("qtail", data+start, length-start);
134: }
1.67 paf 135: // cut tail
136: length=pos;
137: break;
138: }
139: }
140: }
1.68 paf 141: // Scan for pairs, unescaping and storing them as they are found
142: for(size_t pos=0; pos<length; ) {
1.16 paf 143: size_t start=pos;
1.68 paf 144: size_t finish=length;
145: for(; pos<length; pos++) {
146: if(data[pos]=='&') {
147: finish=pos++;
1.3 paf 148: break;
149: }
150: }
1.68 paf 151:
152: size_t aftereq=start;
153: size_t lookingeq=start;
154: for(; lookingeq<finish; lookingeq++) {
155: if(data[lookingeq]=='=') {
156: aftereq=++lookingeq;
1.3 paf 157: break;
158: }
159: }
1.45 paf 160:
1.75 paf 161: const char* attr=aftereq>start?unescape_chars(data+start, aftereq-1-start):"nameless";
162: char *value=unescape_chars(data+aftereq, finish-aftereq);
1.68 paf 163: AppendFormEntry(attr, value, strlen(value));
1.3 paf 164: }
165: }
166:
1.62 paf 167: static char *pa_tolower(char *s) {
168: for(char *p=s; *p; p++)
1.83 paf 169: *p=(char)tolower((unsigned char)*p);
1.62 paf 170: return s;
171: }
1.49 paf 172: void VForm::ParseMimeInput(
173: char *content_type,
1.75 paf 174: const char* data, size_t length) {
1.3 paf 175: /* Scan for mime-presented pairs, storing them as they are found. */
176: const char
1.62 paf 177: *boundary=pa_tolower(getAttributeValue(content_type, "boundary=", strlen(content_type))),
1.3 paf 178: *lastData=&data[length];
179: if(!boundary)
1.54 paf 180: throw Exception(0,
1.18 paf 181: 0,
1.3 paf 182: "VForm::ParseMimeInput no boundary attribute of Content-Type");
183:
184: while(true) {
1.66 paf 185: const char
1.18 paf 186: *dataStart=searchAttribute(data, boundary, lastData-data),
187: *dataEnd=searchAttribute(dataStart, boundary, lastData-dataStart);
188: size_t headerSize=getHeader(dataStart, lastData-dataStart);
1.3 paf 189:
190: if(!dataStart|!dataEnd|!headerSize) break;
1.47 paf 191: if(searchAttribute(dataStart, "content-disposition: form-data", headerSize)) {
1.16 paf 192: size_t valueSize=(dataEnd-dataStart)-headerSize-5-strlen(boundary);
1.18 paf 193: char *attr=getAttributeValue(dataStart, " name=", headerSize),
194: *fName=getAttributeValue(dataStart, " filename=", headerSize);
1.3 paf 195:
1.78 paf 196: if(attr) {
1.3 paf 197: /* OK, we have a new pair, add it to the list. */
1.80 paf 198: // fName checks are because MSIE passes unassigned <input type=file> as filename="" and empty body
1.85 misha 199: if( fName && (strlen(fName) || valueSize) ){
200: AppendFormFileEntry(attr,
1.80 paf 201: valueSize? &dataStart[headerSize+1]: "",
202: valueSize,
1.85 misha 203: fName);
204: } else {
205: AppendFormEntry(attr,
206: valueSize? &dataStart[headerSize+1]: "",
207: valueSize);
208: }
1.3 paf 209: }
210: }
211: data=(dataEnd-strlen(boundary));
212: }
213: }
214:
1.85 misha 215: void VForm::AppendFormFileEntry(const char* cname_cstr,
1.75 paf 216: const char* raw_cvalue_ptr, const size_t raw_cvalue_size,
1.85 misha 217: const char* file_name_cstr){
218:
1.87 ! misha 219: const char* fname = strdup(file_name_cstr);
! 220: const String& sfile_name=*new String(transcode(fname, strlen(fname)));
! 221:
1.75 paf 222: const String& sname=*new String(transcode(cname_cstr, strlen(cname_cstr)));
1.87 ! misha 223: // maybe transcode text/* files?
! 224: // NO!!! some users want to download file 'as is' or file encoding can be unknown
! 225:
1.85 misha 226: VFile* vfile=new VFile;
227: vfile->set(true/*tainted*/, raw_cvalue_ptr, raw_cvalue_size, sfile_name.cstr());
228:
229: fields.put_dont_replace(sname, vfile);
230:
231: // files
232: Value* vhash=files.get(sname);
233: if(!vhash){
234: // first appearence
235: vhash=new VHash;
236: files.put(sname, vhash);
237: }
238: HashStringValue& hash=*vhash->get_hash();
1.75 paf 239:
1.85 misha 240: hash.put(String::Body::Format(hash.count()), vfile);
241: }
242:
243: void VForm::AppendFormEntry(const char* cname_cstr, const char* raw_cvalue_ptr, const size_t raw_cvalue_size) {
244: const String& sname=*new String(transcode(cname_cstr, strlen(cname_cstr)));
1.75 paf 245:
1.85 misha 246: const char* premature_zero_pos=(const char* )memchr(raw_cvalue_ptr, 0, raw_cvalue_size);
247: size_t cvalue_size=premature_zero_pos?premature_zero_pos-(const char* )raw_cvalue_ptr
248: :raw_cvalue_size;
249: char *cvalue_ptr=strdup(raw_cvalue_ptr, cvalue_size);
250: fix_line_breaks(cvalue_ptr, cvalue_size);
251: String& string=*new String(transcode(cvalue_ptr, cvalue_size), true);
252:
253: // tables
254: {
255: Value* vtable=tables.get(sname);
256: if(!vtable) {
257: // first appearence
258: Table::columns_type columns(new ArrayString(1));
259: *columns+=new String("field");
1.75 paf 260:
1.85 misha 261: vtable=new VTable(new Table(columns));
262: tables.put(sname, vtable);
1.36 parser 263: }
1.85 misha 264: Table& table=*vtable->get_table();
265:
266: // this string becomes next row
267: Table::element_type row(new ArrayString(1));
268: *row+=&string;
269: table+=row;
1.3 paf 270: }
1.69 paf 271:
1.85 misha 272: fields.put_dont_replace(sname, new VString(string));
1.69 paf 273: }
274:
1.85 misha 275:
276: void VForm::refill_fields_tables_and_files() {
1.77 paf 277: fields.clear();
278: tables.clear();
1.85 misha 279: files.clear();
1.77 paf 280: imap.clear();
1.75 paf 281:
1.77 paf 282: //frequest_info.query_string="a=123";
1.3 paf 283: // parsing QS [GET and ?name=value from uri rewrite)]
1.77 paf 284: if(frequest_info.query_string) {
285: size_t length=strlen(frequest_info.query_string);
286: char *buf=strdup(frequest_info.query_string, length);
1.42 parser 287: ParseGetFormInput(buf, length);
288: }
1.62 paf 289:
290: #ifdef DEBUG_POST
1.77 paf 291: frequest_info.method="POST";
1.62 paf 292: void *data;
1.80 paf 293: file_read(*new String("test.stdin"),
1.62 paf 294: data, request.post_size,
295: false/*as_text*/);
296: request.post_data=(char*)data;
1.77 paf 297: frequest_info.content_type="multipart/form-data; boundary=----------mcqY2UDNcdEAoN1mLmne2i";
1.62 paf 298:
299: #endif
1.57 paf 300:
301: // parsing POST data
1.77 paf 302: if(frequest_info.method) {
303: if(const char* content_type=frequest_info.content_type)
304: if(StrEqNc(frequest_info.method, "post", true)) {
1.18 paf 305: if(StrEqNc(content_type, "application/x-www-form-urlencoded", true))
1.77 paf 306: ParseFormInput(frequest_info.post_data, frequest_info.post_size);
1.75 paf 307: else if(StrEqNc(content_type, "multipart/form-data", 0))
308: ParseMimeInput(strdup(content_type),
1.77 paf 309: frequest_info.post_data, frequest_info.post_size);
1.3 paf 310: }
1.57 paf 311: }
1.56 paf 312:
1.77 paf 313: filled_source=&fcharsets.source();
314: filled_client=&fcharsets.client();
315: }
316:
1.85 misha 317: bool VForm::should_refill_fields_tables_and_files() {
1.77 paf 318: return &fcharsets.source()!=filled_source
319: || &fcharsets.client()!=filled_client;
1.1 paf 320: }
1.33 parser 321:
1.75 paf 322: Value* VForm::get_element(const String& aname, Value& aself, bool looking_up) {
1.85 misha 323: if(should_refill_fields_tables_and_files())
324: refill_fields_tables_and_files();
1.56 paf 325:
1.36 parser 326: // $fields
327: if(aname==FORM_FIELDS_ELEMENT_NAME)
1.75 paf 328: return new VHash(fields);
1.36 parser 329:
330: // $tables
331: if(aname==FORM_TABLES_ELEMENT_NAME)
1.75 paf 332: return new VHash(tables);
1.69 paf 333:
1.85 misha 334: // $files
335: if(aname==FORM_FILES_ELEMENT_NAME)
336: return new VHash(files);
337:
1.77 paf 338: // $imap
1.69 paf 339: if(aname==FORM_IMAP_ELEMENT_NAME)
1.75 paf 340: return new VHash(imap);
1.36 parser 341:
1.63 paf 342: // $method
1.75 paf 343: if(Value* result=VStateless_class::get_element(aname, aself, looking_up))
1.33 parser 344: return result;
345:
346: // $element
1.75 paf 347: return fields.get(aname);
1.72 paf 348: }
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