Annotation of parser3/src/types/pa_vform.C, revision 1.68
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:
1.68 ! paf 10: static const char* IDENT_VFORM_C="$Date: 2002/10/21 09:06:53 $";
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) {
1.68 ! paf 106: // cut out ?image_map_tail
! 107: {
1.67 paf 108: for(size_t pos=0; pos<length; pos++) {
109: if(data[pos]=='?') {
110: // fake form field
111: AppendFormEntry("image-map", data+pos+1, length-pos-1);
112: // cut tail
113: length=pos;
114: break;
115: }
116: }
117: }
1.68 ! paf 118: // Scan for pairs, unescaping and storing them as they are found
! 119: for(size_t pos=0; pos<length; ) {
1.16 paf 120: size_t start=pos;
1.68 ! paf 121: size_t finish=length;
! 122: for(; pos<length; pos++) {
! 123: if(data[pos]=='&') {
! 124: finish=pos++;
1.3 paf 125: break;
126: }
127: }
1.68 ! paf 128:
! 129: size_t aftereq=start;
! 130: size_t lookingeq=start;
! 131: for(; lookingeq<finish; lookingeq++) {
! 132: if(data[lookingeq]=='=') {
! 133: aftereq=++lookingeq;
1.3 paf 134: break;
135: }
136: }
1.45 paf 137:
1.68 ! paf 138: const char *attr=aftereq>start?unescape_chars(pool(), data+start, aftereq-1-start):"nameless";
! 139: char *value=unescape_chars(pool(), data+aftereq, finish-aftereq);
! 140: AppendFormEntry(attr, value, strlen(value));
1.3 paf 141: }
142: }
143:
1.62 paf 144: static char *pa_tolower(char *s) {
145: for(char *p=s; *p; p++)
146: *p=tolower(*p);
147: return s;
148: }
1.49 paf 149: void VForm::ParseMimeInput(
150: char *content_type,
1.66 paf 151: const char *data, size_t length) {
1.3 paf 152: /* Scan for mime-presented pairs, storing them as they are found. */
153: const char
1.62 paf 154: *boundary=pa_tolower(getAttributeValue(content_type, "boundary=", strlen(content_type))),
1.3 paf 155: *lastData=&data[length];
156: if(!boundary)
1.54 paf 157: throw Exception(0,
1.18 paf 158: 0,
1.3 paf 159: "VForm::ParseMimeInput no boundary attribute of Content-Type");
160:
161: while(true) {
1.66 paf 162: const char
1.18 paf 163: *dataStart=searchAttribute(data, boundary, lastData-data),
164: *dataEnd=searchAttribute(dataStart, boundary, lastData-dataStart);
165: size_t headerSize=getHeader(dataStart, lastData-dataStart);
1.3 paf 166:
167: if(!dataStart|!dataEnd|!headerSize) break;
1.47 paf 168: if(searchAttribute(dataStart, "content-disposition: form-data", headerSize)) {
1.16 paf 169: size_t valueSize=(dataEnd-dataStart)-headerSize-5-strlen(boundary);
1.18 paf 170: char *attr=getAttributeValue(dataStart, " name=", headerSize),
171: *fName=getAttributeValue(dataStart, " filename=", headerSize);
1.3 paf 172:
1.48 paf 173: if(attr && valueSize) {
1.3 paf 174: /* OK, we have a new pair, add it to the list. */
175: AppendFormEntry(attr, &dataStart[headerSize+1], valueSize, fName);
176: }
177: }
178: data=(dataEnd-strlen(boundary));
179: }
180: }
181:
1.49 paf 182: void VForm::AppendFormEntry(
183: const char *cname_cstr,
1.66 paf 184: const char *raw_cvalue_ptr, const size_t raw_cvalue_size,
1.3 paf 185: const char *file_name) {
1.49 paf 186: const void *sname_ptr;
187: size_t sname_size;
188: transcode(
189: cname_cstr, strlen(cname_cstr),
190: sname_ptr, sname_size);
191: String& sname=*NEW String(pool(), (const char *)sname_ptr, sname_size);
1.3 paf 192:
193: Value *value;
1.17 paf 194: if(file_name) {
195: VFile *vfile=NEW VFile(pool());
1.61 paf 196: // maybe transcode text/* files?
1.66 paf 197: vfile->set(true/*tainted*/, raw_cvalue_ptr, raw_cvalue_size, file_name);
1.17 paf 198: value=vfile;
199: } else {
1.66 paf 200: size_t cvalue_size;
201: char *cvalue_ptr=
202: (char *)copy(raw_cvalue_ptr, cvalue_size=raw_cvalue_size);
1.49 paf 203: fix_line_breaks(cvalue_ptr, cvalue_size);
204:
205: const void *svalue_ptr; size_t svalue_size;
206: transcode(
207: cvalue_ptr, cvalue_size, // client [from]
208: svalue_ptr, svalue_size); // source [to]
1.47 paf 209:
1.3 paf 210: String& string=*NEW String(pool());
1.49 paf 211: string.APPEND_TAINTED((const char*)svalue_ptr, svalue_size, "form", 0);
1.36 parser 212:
213: // tables
214: {
215: Value *valready=(Value *)tables.get(sname);
216: bool existed=valready!=0;
217: Table *table;
218: if(existed) {
219: // second+ appearence
220: table=valready->get_table();
221: } else {
222: // first appearence
1.30 parser 223: Array& columns=*NEW Array(pool(), 1);
1.36 parser 224: columns+=NEW String(pool(), "field");
1.30 parser 225: table=NEW Table(pool(), 0, &columns);
226: }
227: // this string becomes next row
228: Array& row=*NEW Array(pool(), 1);
229: row+=&string;
230: *table+=&row;
1.36 parser 231: // not existed before? add it
232: if(!existed)
233: tables.put(sname, NEW VTable(pool(), table));
234: }
235: value=NEW VString(string);
1.3 paf 236: }
237:
1.32 parser 238: fields.put_dont_replace(sname, value);
1.3 paf 239: }
1.1 paf 240:
1.36 parser 241: void VForm::fill_fields_and_tables(Request& request) {
1.3 paf 242: // parsing QS [GET and ?name=value from uri rewrite)]
1.42 parser 243: if(request.info.query_string) {
244: size_t length=strlen(request.info.query_string);
245: char *buf=(char *)malloc(length);
246: memcpy(buf, request.info.query_string, length);
247: ParseGetFormInput(buf, length);
248: }
1.62 paf 249:
250: #ifdef DEBUG_POST
251: request.info.method="POST";
252: void *data;
253: file_read(pool(), *NEW String(pool(), "opera.stdin"), //"ie.stdin"), //
254: data, request.post_size,
255: false/*as_text*/);
256: request.post_data=(char*)data;
257: request.info.content_type="multipart/form-data; boundary=----------mcqY2UDNcdEAoN1mLmne2i";
258: //request.info.content_type="multipart/form-data; boundary=---------------------------7d23111f44403a4";
259:
260: #endif
1.57 paf 261:
262: // parsing POST data
1.4 paf 263: if(request.info.method) {
1.3 paf 264: if(const char *content_type=request.info.content_type)
1.18 paf 265: if(StrEqNc(request.info.method, "post", true)) {
266: if(StrEqNc(content_type, "application/x-www-form-urlencoded", true))
1.21 paf 267: ParseFormInput(request.post_data, request.post_size);
1.42 parser 268: else if(StrEqNc(content_type, "multipart/form-data", 0)) {
269: size_t length=strlen(content_type)+1;
270: char *buf=(char *)malloc(length);
271: memcpy(buf, content_type, length);
272: ParseMimeInput(buf, request.post_data, request.post_size);
273: }
1.3 paf 274: }
1.57 paf 275: }
1.56 paf 276:
277: filled=true;
1.1 paf 278: }
1.33 parser 279:
1.65 paf 280: Value *VForm::get_element(const String& aname, Value *aself, bool looking_up) {
1.56 paf 281: if(!filled)
282: throw Exception("parser.runtime",
283: &aname,
284: "not determined yet");
285:
1.36 parser 286: // $fields
287: if(aname==FORM_FIELDS_ELEMENT_NAME)
288: return NEW VHash(pool(), Hash(fields));
289:
290: // $tables
291: if(aname==FORM_TABLES_ELEMENT_NAME)
292: return NEW VHash(pool(), Hash(tables));
293:
1.63 paf 294: // $method
1.65 paf 295: if(Value *result=VStateless_class::get_element(aname, aself, looking_up))
1.33 parser 296: return result;
297:
298: // $element
299: return static_cast<Value *>(fields.get(aname));
1.58 paf 300: }
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