Annotation of parser3/src/types/pa_vform.C, revision 1.67
1.27 paf 1: /** @file
2: Parser: @b form class.
1.10 paf 3:
1.53 paf 4: Copyright(c) 2001, 2002 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:
1.67 ! paf 10: static const char* IDENT_VFORM_C="$Date: 2002/08/15 10:13:20 $";
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:
1.18 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:
1.66 paf 40: static const char *searchAttribute(const char *data,
1.62 paf 41: const char *attr, //< expected to be lowercased
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:
1.57 paf 61: extern Methoded *form_base_class;
62:
1.55 paf 63: VForm::VForm(Pool& apool) : VStateless_class(apool, 0, form_base_class),
1.50 paf 64: fields(apool),
1.56 paf 65: tables(apool),
66: filled(false) {
1.50 paf 67: }
68:
1.16 paf 69: char *VForm::strpart(const char *str, size_t len) {
1.7 paf 70: char *result=(char *)malloc(len+1);
1.3 paf 71: if (!result) return NULL;
1.18 paf 72: memcpy(result, str, len);
1.3 paf 73: result[len]=0;
74: return result;
75: }
76:
1.66 paf 77: char *VForm::getAttributeValue(const char *data, char *attr, size_t len) {
78: const char *value=searchAttribute(data, attr, len);
1.3 paf 79: if (value){
1.18 paf 80: size_t i;
81: if (!(len-=value-data)) return NULL;
82: if (*value=='"') {
83: for (i=1;i<len;i++) if (value[i]=='"') break;
84: return strpart(&value[1], i-1);
85: } else {
86: for (i=0;i<len;i++) if (strchr(" ;\"\n\r", value[i])) break;
87: return strpart(value, i);
88: }
1.3 paf 89: }
90: return NULL;
91: }
92:
1.49 paf 93: void VForm::transcode(
94: const void *client_body, size_t client_content_length,
95: const void *& source_body, size_t& source_content_length) {
1.50 paf 96: Charset::transcode(pool(),
97: pool().get_client_charset(), client_body, client_content_length,
98: pool().get_source_charset(), source_body, source_content_length);
1.49 paf 99: }
100:
1.66 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:
1.66 paf 105: void VForm::ParseFormInput(const char *data, size_t length) {
1.67 ! paf 106: { // cut out ?image_map_tail
! 107: for(size_t pos=0; pos<length; pos++) {
! 108: if(data[pos]=='?') {
! 109: // fake form field
! 110: AppendFormEntry("image-map", data+pos+1, length-pos-1);
! 111: // cut tail
! 112: length=pos;
! 113: break;
! 114: }
! 115: }
! 116: }
1.8 paf 117: /* Scan for pairs, unescaping and storing them as they are found. */
1.16 paf 118: size_t pos=0;
1.3 paf 119: while(pos !=length) {
1.16 paf 120: size_t foundEq=0;
121: size_t foundAmp=0;
122: size_t start=pos;
123: size_t len=0;
1.3 paf 124: while(pos !=length) {
125: if(data[pos]=='=') {
126: foundEq=1;
127: pos++;
128: break;
129: }
130: pos++;
131: len++;
132: }
133: if(!foundEq)
134: break;
1.42 parser 135: char *attr=unescape_chars(pool(), data+start, len);
1.3 paf 136: start=pos;
137: len=0;
138: while(pos !=length) {
139: if(data[pos]=='&') {
140: foundAmp=1;
141: pos++;
142: break;
143: }
144: pos++;
145: len++;
146: }
147: /* The last pair probably won't be followed by a &, but
148: that's fine, so check for that after accepting it */
1.42 parser 149: char *value=unescape_chars(pool(), data+start, len);
1.3 paf 150: /* OK, we have a new pair, add it to the list. */
1.45 paf 151: size_t value_size=strlen(value);
152: AppendFormEntry(attr, value, value_size);
153:
1.3 paf 154: if(!foundAmp)
155: break;
156: }
157: }
158:
1.62 paf 159: static char *pa_tolower(char *s) {
160: for(char *p=s; *p; p++)
161: *p=tolower(*p);
162: return s;
163: }
1.49 paf 164: void VForm::ParseMimeInput(
165: char *content_type,
1.66 paf 166: const char *data, size_t length) {
1.3 paf 167: /* Scan for mime-presented pairs, storing them as they are found. */
168: const char
1.62 paf 169: *boundary=pa_tolower(getAttributeValue(content_type, "boundary=", strlen(content_type))),
1.3 paf 170: *lastData=&data[length];
171: if(!boundary)
1.54 paf 172: throw Exception(0,
1.18 paf 173: 0,
1.3 paf 174: "VForm::ParseMimeInput no boundary attribute of Content-Type");
175:
176: while(true) {
1.66 paf 177: const char
1.18 paf 178: *dataStart=searchAttribute(data, boundary, lastData-data),
179: *dataEnd=searchAttribute(dataStart, boundary, lastData-dataStart);
180: size_t headerSize=getHeader(dataStart, lastData-dataStart);
1.3 paf 181:
182: if(!dataStart|!dataEnd|!headerSize) break;
1.47 paf 183: if(searchAttribute(dataStart, "content-disposition: form-data", headerSize)) {
1.16 paf 184: size_t valueSize=(dataEnd-dataStart)-headerSize-5-strlen(boundary);
1.18 paf 185: char *attr=getAttributeValue(dataStart, " name=", headerSize),
186: *fName=getAttributeValue(dataStart, " filename=", headerSize);
1.3 paf 187:
1.48 paf 188: if(attr && valueSize) {
1.3 paf 189: /* OK, we have a new pair, add it to the list. */
190: AppendFormEntry(attr, &dataStart[headerSize+1], valueSize, fName);
191: }
192: }
193: data=(dataEnd-strlen(boundary));
194: }
195: }
196:
1.49 paf 197: void VForm::AppendFormEntry(
198: const char *cname_cstr,
1.66 paf 199: const char *raw_cvalue_ptr, const size_t raw_cvalue_size,
1.3 paf 200: const char *file_name) {
1.49 paf 201: const void *sname_ptr;
202: size_t sname_size;
203: transcode(
204: cname_cstr, strlen(cname_cstr),
205: sname_ptr, sname_size);
206: String& sname=*NEW String(pool(), (const char *)sname_ptr, sname_size);
1.3 paf 207:
208: Value *value;
1.17 paf 209: if(file_name) {
210: VFile *vfile=NEW VFile(pool());
1.61 paf 211: // maybe transcode text/* files?
1.66 paf 212: vfile->set(true/*tainted*/, raw_cvalue_ptr, raw_cvalue_size, file_name);
1.17 paf 213: value=vfile;
214: } else {
1.66 paf 215: size_t cvalue_size;
216: char *cvalue_ptr=
217: (char *)copy(raw_cvalue_ptr, cvalue_size=raw_cvalue_size);
1.49 paf 218: fix_line_breaks(cvalue_ptr, cvalue_size);
219:
220: const void *svalue_ptr; size_t svalue_size;
221: transcode(
222: cvalue_ptr, cvalue_size, // client [from]
223: svalue_ptr, svalue_size); // source [to]
1.47 paf 224:
1.3 paf 225: String& string=*NEW String(pool());
1.49 paf 226: string.APPEND_TAINTED((const char*)svalue_ptr, svalue_size, "form", 0);
1.36 parser 227:
228: // tables
229: {
230: Value *valready=(Value *)tables.get(sname);
231: bool existed=valready!=0;
232: Table *table;
233: if(existed) {
234: // second+ appearence
235: table=valready->get_table();
236: } else {
237: // first appearence
1.30 parser 238: Array& columns=*NEW Array(pool(), 1);
1.36 parser 239: columns+=NEW String(pool(), "field");
1.30 parser 240: table=NEW Table(pool(), 0, &columns);
241: }
242: // this string becomes next row
243: Array& row=*NEW Array(pool(), 1);
244: row+=&string;
245: *table+=&row;
1.36 parser 246: // not existed before? add it
247: if(!existed)
248: tables.put(sname, NEW VTable(pool(), table));
249: }
250: value=NEW VString(string);
1.3 paf 251: }
252:
1.32 parser 253: fields.put_dont_replace(sname, value);
1.3 paf 254: }
1.1 paf 255:
1.36 parser 256: void VForm::fill_fields_and_tables(Request& request) {
1.3 paf 257: // parsing QS [GET and ?name=value from uri rewrite)]
1.42 parser 258: if(request.info.query_string) {
259: size_t length=strlen(request.info.query_string);
260: char *buf=(char *)malloc(length);
261: memcpy(buf, request.info.query_string, length);
262: ParseGetFormInput(buf, length);
263: }
1.62 paf 264:
265: #ifdef DEBUG_POST
266: request.info.method="POST";
267: void *data;
268: file_read(pool(), *NEW String(pool(), "opera.stdin"), //"ie.stdin"), //
269: data, request.post_size,
270: false/*as_text*/);
271: request.post_data=(char*)data;
272: request.info.content_type="multipart/form-data; boundary=----------mcqY2UDNcdEAoN1mLmne2i";
273: //request.info.content_type="multipart/form-data; boundary=---------------------------7d23111f44403a4";
274:
275: #endif
1.57 paf 276:
277: // parsing POST data
1.4 paf 278: if(request.info.method) {
1.3 paf 279: if(const char *content_type=request.info.content_type)
1.18 paf 280: if(StrEqNc(request.info.method, "post", true)) {
281: if(StrEqNc(content_type, "application/x-www-form-urlencoded", true))
1.21 paf 282: ParseFormInput(request.post_data, request.post_size);
1.42 parser 283: else if(StrEqNc(content_type, "multipart/form-data", 0)) {
284: size_t length=strlen(content_type)+1;
285: char *buf=(char *)malloc(length);
286: memcpy(buf, content_type, length);
287: ParseMimeInput(buf, request.post_data, request.post_size);
288: }
1.3 paf 289: }
1.57 paf 290: }
1.56 paf 291:
292: filled=true;
1.1 paf 293: }
1.33 parser 294:
1.65 paf 295: Value *VForm::get_element(const String& aname, Value *aself, bool looking_up) {
1.56 paf 296: if(!filled)
297: throw Exception("parser.runtime",
298: &aname,
299: "not determined yet");
300:
1.36 parser 301: // $fields
302: if(aname==FORM_FIELDS_ELEMENT_NAME)
303: return NEW VHash(pool(), Hash(fields));
304:
305: // $tables
306: if(aname==FORM_TABLES_ELEMENT_NAME)
307: return NEW VHash(pool(), Hash(tables));
308:
1.63 paf 309: // $method
1.65 paf 310: if(Value *result=VStateless_class::get_element(aname, aself, looking_up))
1.33 parser 311: return result;
312:
313: // $element
314: return static_cast<Value *>(fields.get(aname));
1.58 paf 315: }
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