Annotation of parser3/src/types/pa_vform.C, revision 1.95
1.27 paf 1: /** @file
2: Parser: @b form class.
1.10 paf 3:
1.95 ! misha 4: Copyright(c) 2001-2009 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:
1.95 ! misha 10: static const char * const IDENT_VFORM_C="$Date: 2009-01-12 07:50:35 $";
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),
1.91 misha 68: filled_client(0),
69: filled_post(0) {
1.3 paf 70: }
71:
1.92 misha 72: char *VForm::strpart(const char* str, size_t len) {
73: char *result=new(PointerFreeGC) char[len+1];
74: memcpy(result, str, len);
75: result[len]=0;
76: return result;
77: }
78:
1.75 paf 79: char *VForm::getAttributeValue(const char* data, char *attr, size_t len) {
80: const char* value=searchAttribute(data, attr, len);
1.3 paf 81: if (value){
1.18 paf 82: size_t i;
83: if (!(len-=value-data)) return NULL;
84: if (*value=='"') {
85: for (i=1;i<len;i++) if (value[i]=='"') break;
86: return strpart(&value[1], i-1);
87: } else {
88: for (i=0;i<len;i++) if (strchr(" ;\"\n\r", value[i])) break;
89: return strpart(value, i);
90: }
1.3 paf 91: }
92: return NULL;
93: }
94:
1.75 paf 95: String::C VForm::transcode(const char* client, size_t client_size) {
96: return Charset::transcode(
97: String::C(strdup(client, client_size), client_size),
1.91 misha 98: filled_post?*filled_post:fcharsets.client(),
1.77 paf 99: fcharsets.source());
1.49 paf 100: }
101:
1.75 paf 102: void VForm::ParseGetFormInput(const char* query_string, size_t length) {
1.42 parser 103: ParseFormInput(query_string, length);
1.3 paf 104: }
105:
1.69 paf 106:
1.75 paf 107: static int atoi(const char* data, size_t alength) {
1.69 paf 108: char buf[MAX_STRING];
1.82 paf 109: size_t length=min(alength, sizeof(buf)-1);
110: memcpy(buf, data, length); buf[length]=0;
1.69 paf 111: return atoi(buf);
112: }
1.75 paf 113: void VForm::ParseFormInput(const char* data, size_t length) {
1.68 paf 114: // cut out ?image_map_tail
115: {
1.67 paf 116: for(size_t pos=0; pos<length; pos++) {
117: if(data[pos]=='?') {
1.69 paf 118: size_t start=pos+1;
119: size_t aftercomma=start;
120: size_t lookingcomma=start;
121: for(; lookingcomma<length; lookingcomma++) {
122: if(data[lookingcomma]==',') {
123: aftercomma=++lookingcomma;
124: break;
125: }
126: }
127:
128: if(aftercomma>start) { // ?x,y
129: int x=atoi(data+start, aftercomma-1-start);
130: int y=atoi(data+aftercomma, length-aftercomma);
1.75 paf 131: imap.put(String("x"), new VInt(x));
132: imap.put(String("y"), new VInt(y));
1.69 paf 133: } else { // ?qtail
134: AppendFormEntry("qtail", data+start, length-start);
135: }
1.67 paf 136: // cut tail
137: length=pos;
138: break;
139: }
140: }
141: }
1.68 paf 142: // Scan for pairs, unescaping and storing them as they are found
143: for(size_t pos=0; pos<length; ) {
1.16 paf 144: size_t start=pos;
1.68 paf 145: size_t finish=length;
146: for(; pos<length; pos++) {
147: if(data[pos]=='&') {
148: finish=pos++;
1.3 paf 149: break;
150: }
151: }
1.68 paf 152:
153: size_t aftereq=start;
154: size_t lookingeq=start;
155: for(; lookingeq<finish; lookingeq++) {
156: if(data[lookingeq]=='=') {
157: aftereq=++lookingeq;
1.3 paf 158: break;
159: }
160: }
1.45 paf 161:
1.91 misha 162: const char* attr=aftereq>start?unescape_chars(data+start, aftereq-1-start, &fcharsets.client()):"nameless";
163: char *value=unescape_chars(data+aftereq, finish-aftereq, &fcharsets.client());
1.68 paf 164: AppendFormEntry(attr, value, strlen(value));
1.3 paf 165: }
166: }
167:
1.92 misha 168: static char* pa_tolower(char *str){
169: if(!str)
170: return 0;
171: for(char *p=str; *p; p++)
172: *p=(char)tolower((unsigned char)*p);
173: return str;
174: }
175:
1.49 paf 176: void VForm::ParseMimeInput(
177: char *content_type,
1.75 paf 178: const char* data, size_t length) {
1.3 paf 179: /* Scan for mime-presented pairs, storing them as they are found. */
1.92 misha 180: const char* boundary=pa_tolower(getAttributeValue(content_type, "boundary=", strlen(content_type)));
181: if(!boundary)
1.54 paf 182: throw Exception(0,
1.18 paf 183: 0,
1.3 paf 184: "VForm::ParseMimeInput no boundary attribute of Content-Type");
185:
1.92 misha 186: const char* lastData=&data[length];
187:
1.3 paf 188: while(true) {
1.66 paf 189: const char
1.18 paf 190: *dataStart=searchAttribute(data, boundary, lastData-data),
191: *dataEnd=searchAttribute(dataStart, boundary, lastData-dataStart);
1.92 misha 192:
1.18 paf 193: size_t headerSize=getHeader(dataStart, lastData-dataStart);
1.3 paf 194:
195: if(!dataStart|!dataEnd|!headerSize) break;
1.47 paf 196: if(searchAttribute(dataStart, "content-disposition: form-data", headerSize)) {
1.16 paf 197: size_t valueSize=(dataEnd-dataStart)-headerSize-5-strlen(boundary);
1.18 paf 198: char *attr=getAttributeValue(dataStart, " name=", headerSize),
199: *fName=getAttributeValue(dataStart, " filename=", headerSize);
1.3 paf 200:
1.78 paf 201: if(attr) {
1.3 paf 202: /* OK, we have a new pair, add it to the list. */
1.80 paf 203: // fName checks are because MSIE passes unassigned <input type=file> as filename="" and empty body
1.85 misha 204: if( fName && (strlen(fName) || valueSize) ){
205: AppendFormFileEntry(attr,
1.80 paf 206: valueSize? &dataStart[headerSize+1]: "",
207: valueSize,
1.85 misha 208: fName);
209: } else {
210: AppendFormEntry(attr,
211: valueSize? &dataStart[headerSize+1]: "",
212: valueSize);
213: }
1.3 paf 214: }
215: }
216: data=(dataEnd-strlen(boundary));
217: }
218: }
219:
1.85 misha 220: void VForm::AppendFormFileEntry(const char* cname_cstr,
1.75 paf 221: const char* raw_cvalue_ptr, const size_t raw_cvalue_size,
1.85 misha 222: const char* file_name_cstr){
223:
1.87 misha 224: const char* fname = strdup(file_name_cstr);
225: const String& sfile_name=*new String(transcode(fname, strlen(fname)));
226:
1.75 paf 227: const String& sname=*new String(transcode(cname_cstr, strlen(cname_cstr)));
1.87 misha 228: // maybe transcode text/* files?
1.89 misha 229: // NO!!! some users want to upload file 'as is' or file encoding can be unknown
1.87 misha 230:
1.85 misha 231: VFile* vfile=new VFile;
232: vfile->set(true/*tainted*/, raw_cvalue_ptr, raw_cvalue_size, sfile_name.cstr());
233:
234: fields.put_dont_replace(sname, vfile);
235:
236: // files
237: Value* vhash=files.get(sname);
238: if(!vhash){
239: // first appearence
240: vhash=new VHash;
241: files.put(sname, vhash);
242: }
243: HashStringValue& hash=*vhash->get_hash();
1.75 paf 244:
1.85 misha 245: hash.put(String::Body::Format(hash.count()), vfile);
246: }
247:
248: void VForm::AppendFormEntry(const char* cname_cstr, const char* raw_cvalue_ptr, const size_t raw_cvalue_size) {
249: const String& sname=*new String(transcode(cname_cstr, strlen(cname_cstr)));
1.75 paf 250:
1.85 misha 251: const char* premature_zero_pos=(const char* )memchr(raw_cvalue_ptr, 0, raw_cvalue_size);
252: size_t cvalue_size=premature_zero_pos?premature_zero_pos-(const char* )raw_cvalue_ptr
253: :raw_cvalue_size;
254: char *cvalue_ptr=strdup(raw_cvalue_ptr, cvalue_size);
255: fix_line_breaks(cvalue_ptr, cvalue_size);
1.95 ! misha 256: String& string=*new String(transcode(cvalue_ptr, cvalue_size), String::L_TAINTED);
1.85 misha 257:
258: // tables
259: {
260: Value* vtable=tables.get(sname);
261: if(!vtable) {
262: // first appearence
263: Table::columns_type columns(new ArrayString(1));
264: *columns+=new String("field");
1.75 paf 265:
1.85 misha 266: vtable=new VTable(new Table(columns));
267: tables.put(sname, vtable);
1.36 parser 268: }
1.85 misha 269: Table& table=*vtable->get_table();
270:
271: // this string becomes next row
272: Table::element_type row(new ArrayString(1));
273: *row+=&string;
274: table+=row;
1.3 paf 275: }
1.69 paf 276:
1.85 misha 277: fields.put_dont_replace(sname, new VString(string));
1.69 paf 278: }
279:
1.85 misha 280:
281: void VForm::refill_fields_tables_and_files() {
1.77 paf 282: fields.clear();
283: tables.clear();
1.85 misha 284: files.clear();
1.77 paf 285: imap.clear();
1.75 paf 286:
1.77 paf 287: //frequest_info.query_string="a=123";
1.3 paf 288: // parsing QS [GET and ?name=value from uri rewrite)]
1.77 paf 289: if(frequest_info.query_string) {
290: size_t length=strlen(frequest_info.query_string);
291: char *buf=strdup(frequest_info.query_string, length);
1.42 parser 292: ParseGetFormInput(buf, length);
293: }
1.62 paf 294:
295: #ifdef DEBUG_POST
1.77 paf 296: frequest_info.method="POST";
1.62 paf 297: void *data;
1.80 paf 298: file_read(*new String("test.stdin"),
1.62 paf 299: data, request.post_size,
300: false/*as_text*/);
301: request.post_data=(char*)data;
1.77 paf 302: frequest_info.content_type="multipart/form-data; boundary=----------mcqY2UDNcdEAoN1mLmne2i";
1.62 paf 303:
304: #endif
1.57 paf 305:
306: // parsing POST data
1.77 paf 307: if(frequest_info.method) {
308: if(const char* content_type=frequest_info.content_type)
1.89 misha 309: if(StrStartFromNC(frequest_info.method, "post", true)) {
1.91 misha 310: if(StrStartFromNC(content_type, HTTP_CONTENT_TYPE_FORM_URLENCODED, false)){
311: Charset* remote_charset=detect_charset(content_type);
312: if(remote_charset)
313: filled_post=remote_charset;
1.77 paf 314: ParseFormInput(frequest_info.post_data, frequest_info.post_size);
1.94 misha 315: } else if(StrStartFromNC(content_type, HTTP_CONTENT_TYPE_MULTIPART_FORMDATA, false))
1.75 paf 316: ParseMimeInput(strdup(content_type),
1.77 paf 317: frequest_info.post_data, frequest_info.post_size);
1.3 paf 318: }
1.57 paf 319: }
1.56 paf 320:
1.77 paf 321: filled_source=&fcharsets.source();
322: filled_client=&fcharsets.client();
323: }
324:
1.85 misha 325: bool VForm::should_refill_fields_tables_and_files() {
1.91 misha 326: return !(
327: &fcharsets.source()==filled_source
328: && (filled_post || &fcharsets.client()==filled_client)
329: );
1.1 paf 330: }
1.33 parser 331:
1.75 paf 332: Value* VForm::get_element(const String& aname, Value& aself, bool looking_up) {
1.85 misha 333: if(should_refill_fields_tables_and_files())
334: refill_fields_tables_and_files();
1.56 paf 335:
1.36 parser 336: // $fields
337: if(aname==FORM_FIELDS_ELEMENT_NAME)
1.75 paf 338: return new VHash(fields);
1.36 parser 339:
340: // $tables
341: if(aname==FORM_TABLES_ELEMENT_NAME)
1.75 paf 342: return new VHash(tables);
1.69 paf 343:
1.85 misha 344: // $files
345: if(aname==FORM_FILES_ELEMENT_NAME)
346: return new VHash(files);
347:
1.77 paf 348: // $imap
1.69 paf 349: if(aname==FORM_IMAP_ELEMENT_NAME)
1.75 paf 350: return new VHash(imap);
1.36 parser 351:
1.63 paf 352: // $method
1.75 paf 353: if(Value* result=VStateless_class::get_element(aname, aself, looking_up))
1.33 parser 354: return result;
355:
1.95 ! misha 356: // $field
1.75 paf 357: return fields.get(aname);
1.72 paf 358: }
1.93 misha 359:
360: Charset* VForm::get_post_charset(){
361: if(should_refill_fields_tables_and_files())
362: refill_fields_tables_and_files();
363: if(filled_post)
364: return filled_post;
365: return 0;
366: }
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