Annotation of parser3/src/types/pa_vform.C, revision 1.74
1.27 paf 1: /** @file
2: Parser: @b form class.
1.10 paf 3:
1.74 ! 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 ! paf 10: static const char* IDENT_VFORM_C="$Date: 2002/12/04 11:45:34 $";
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),
1.69 paf 66: imap(apool),
1.56 paf 67: filled(false) {
1.50 paf 68: }
69:
1.16 paf 70: char *VForm::strpart(const char *str, size_t len) {
1.7 paf 71: char *result=(char *)malloc(len+1);
1.3 paf 72: if (!result) return NULL;
1.18 paf 73: memcpy(result, str, len);
1.3 paf 74: result[len]=0;
75: return result;
76: }
77:
1.66 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:
1.49 paf 94: void VForm::transcode(
95: const void *client_body, size_t client_content_length,
96: const void *& source_body, size_t& source_content_length) {
1.50 paf 97: Charset::transcode(pool(),
98: pool().get_client_charset(), client_body, client_content_length,
99: pool().get_source_charset(), source_body, source_content_length);
1.49 paf 100: }
101:
1.66 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:
107: static int atoi(const char *data, size_t alength) {
108: char buf[MAX_STRING];
109: size_t length=min((int)alength, MAX_STRING-1);
110: strncpy(buf, data, length);
111: return atoi(buf);
112: }
1.66 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);
131: imap.put(*NEW String(pool(), "x"), NEW VInt(pool(), x));
132: imap.put(*NEW String(pool(), "y"), NEW VInt(pool(), y));
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:
1.68 paf 162: const char *attr=aftereq>start?unescape_chars(pool(), data+start, aftereq-1-start):"nameless";
163: char *value=unescape_chars(pool(), data+aftereq, finish-aftereq);
164: AppendFormEntry(attr, value, strlen(value));
1.3 paf 165: }
166: }
167:
1.62 paf 168: static char *pa_tolower(char *s) {
169: for(char *p=s; *p; p++)
170: *p=tolower(*p);
171: return s;
172: }
1.49 paf 173: void VForm::ParseMimeInput(
174: char *content_type,
1.66 paf 175: const char *data, size_t length) {
1.3 paf 176: /* Scan for mime-presented pairs, storing them as they are found. */
177: const char
1.62 paf 178: *boundary=pa_tolower(getAttributeValue(content_type, "boundary=", strlen(content_type))),
1.3 paf 179: *lastData=&data[length];
180: if(!boundary)
1.54 paf 181: throw Exception(0,
1.18 paf 182: 0,
1.3 paf 183: "VForm::ParseMimeInput no boundary attribute of Content-Type");
184:
185: while(true) {
1.66 paf 186: const char
1.18 paf 187: *dataStart=searchAttribute(data, boundary, lastData-data),
188: *dataEnd=searchAttribute(dataStart, boundary, lastData-dataStart);
189: size_t headerSize=getHeader(dataStart, lastData-dataStart);
1.3 paf 190:
191: if(!dataStart|!dataEnd|!headerSize) break;
1.47 paf 192: if(searchAttribute(dataStart, "content-disposition: form-data", headerSize)) {
1.16 paf 193: size_t valueSize=(dataEnd-dataStart)-headerSize-5-strlen(boundary);
1.18 paf 194: char *attr=getAttributeValue(dataStart, " name=", headerSize),
195: *fName=getAttributeValue(dataStart, " filename=", headerSize);
1.3 paf 196:
1.48 paf 197: if(attr && valueSize) {
1.3 paf 198: /* OK, we have a new pair, add it to the list. */
199: AppendFormEntry(attr, &dataStart[headerSize+1], valueSize, fName);
200: }
201: }
202: data=(dataEnd-strlen(boundary));
203: }
204: }
205:
1.49 paf 206: void VForm::AppendFormEntry(
207: const char *cname_cstr,
1.66 paf 208: const char *raw_cvalue_ptr, const size_t raw_cvalue_size,
1.3 paf 209: const char *file_name) {
1.49 paf 210: const void *sname_ptr;
211: size_t sname_size;
212: transcode(
213: cname_cstr, strlen(cname_cstr),
214: sname_ptr, sname_size);
215: String& sname=*NEW String(pool(), (const char *)sname_ptr, sname_size);
1.3 paf 216:
217: Value *value;
1.17 paf 218: if(file_name) {
219: VFile *vfile=NEW VFile(pool());
1.61 paf 220: // maybe transcode text/* files?
1.66 paf 221: vfile->set(true/*tainted*/, raw_cvalue_ptr, raw_cvalue_size, file_name);
1.17 paf 222: value=vfile;
223: } else {
1.73 paf 224: const char *premature_zero_pos=(const char *)memchr(raw_cvalue_ptr, 0, raw_cvalue_size);
225: size_t cvalue_size=premature_zero_pos?premature_zero_pos-(const char *)raw_cvalue_ptr
226: :raw_cvalue_size;
227: char *cvalue_ptr=(char *)copy(raw_cvalue_ptr, cvalue_size);
1.49 paf 228: fix_line_breaks(cvalue_ptr, cvalue_size);
229:
230: const void *svalue_ptr; size_t svalue_size;
231: transcode(
232: cvalue_ptr, cvalue_size, // client [from]
233: svalue_ptr, svalue_size); // source [to]
1.47 paf 234:
1.3 paf 235: String& string=*NEW String(pool());
1.49 paf 236: string.APPEND_TAINTED((const char*)svalue_ptr, svalue_size, "form", 0);
1.36 parser 237:
238: // tables
239: {
240: Value *valready=(Value *)tables.get(sname);
241: bool existed=valready!=0;
242: Table *table;
243: if(existed) {
244: // second+ appearence
245: table=valready->get_table();
246: } else {
247: // first appearence
1.30 parser 248: Array& columns=*NEW Array(pool(), 1);
1.36 parser 249: columns+=NEW String(pool(), "field");
1.30 parser 250: table=NEW Table(pool(), 0, &columns);
251: }
252: // this string becomes next row
253: Array& row=*NEW Array(pool(), 1);
254: row+=&string;
255: *table+=&row;
1.36 parser 256: // not existed before? add it
257: if(!existed)
258: tables.put(sname, NEW VTable(pool(), table));
259: }
260: value=NEW VString(string);
1.3 paf 261: }
1.69 paf 262:
263: fields.put_dont_replace(sname, value);
264: }
265:
1.36 parser 266: void VForm::fill_fields_and_tables(Request& request) {
1.3 paf 267: // parsing QS [GET and ?name=value from uri rewrite)]
1.42 parser 268: if(request.info.query_string) {
269: size_t length=strlen(request.info.query_string);
270: char *buf=(char *)malloc(length);
271: memcpy(buf, request.info.query_string, length);
272: ParseGetFormInput(buf, length);
273: }
1.62 paf 274:
275: #ifdef DEBUG_POST
276: request.info.method="POST";
277: void *data;
278: file_read(pool(), *NEW String(pool(), "opera.stdin"), //"ie.stdin"), //
279: data, request.post_size,
280: false/*as_text*/);
281: request.post_data=(char*)data;
282: request.info.content_type="multipart/form-data; boundary=----------mcqY2UDNcdEAoN1mLmne2i";
283: //request.info.content_type="multipart/form-data; boundary=---------------------------7d23111f44403a4";
284:
285: #endif
1.57 paf 286:
287: // parsing POST data
1.4 paf 288: if(request.info.method) {
1.3 paf 289: if(const char *content_type=request.info.content_type)
1.18 paf 290: if(StrEqNc(request.info.method, "post", true)) {
291: if(StrEqNc(content_type, "application/x-www-form-urlencoded", true))
1.21 paf 292: ParseFormInput(request.post_data, request.post_size);
1.42 parser 293: else if(StrEqNc(content_type, "multipart/form-data", 0)) {
294: size_t length=strlen(content_type)+1;
295: char *buf=(char *)malloc(length);
296: memcpy(buf, content_type, length);
297: ParseMimeInput(buf, request.post_data, request.post_size);
298: }
1.3 paf 299: }
1.57 paf 300: }
1.56 paf 301:
302: filled=true;
1.1 paf 303: }
1.33 parser 304:
1.71 paf 305: Value *VForm::get_element(const String& aname, Value& aself, bool looking_up) {
1.56 paf 306: if(!filled)
307: throw Exception("parser.runtime",
308: &aname,
309: "not determined yet");
310:
1.36 parser 311: // $fields
312: if(aname==FORM_FIELDS_ELEMENT_NAME)
313: return NEW VHash(pool(), Hash(fields));
314:
315: // $tables
316: if(aname==FORM_TABLES_ELEMENT_NAME)
317: return NEW VHash(pool(), Hash(tables));
1.69 paf 318:
319: if(aname==FORM_IMAP_ELEMENT_NAME)
320: return NEW VHash(pool(), Hash(imap));
1.36 parser 321:
1.63 paf 322: // $method
1.65 paf 323: if(Value *result=VStateless_class::get_element(aname, aself, looking_up))
1.33 parser 324: return result;
325:
326: // $element
327: return static_cast<Value *>(fields.get(aname));
1.72 paf 328: }
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