Annotation of parser3/src/types/pa_vform.C, revision 1.82
1.27 paf 1: /** @file
2: Parser: @b form class.
1.10 paf 3:
1.79 paf 4: Copyright(c) 2001-2004 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:
1.82 ! paf 10: static const char * const IDENT_VFORM_C="$Date: 2004/03/30 08:32:17 $";
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:
1.75 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:
1.75 paf 40: static const char* searchAttribute(const char* data,
41: const char* attr, //< expected to be lowercased
1.62 paf 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:
1.75 paf 61: extern Methoded* form_base_class;
1.57 paf 62:
1.77 paf 63: VForm::VForm(Request_charsets& acharsets, Request_info& arequest_info): VStateless_class(0, form_base_class),
64: fcharsets(acharsets),
65: frequest_info(arequest_info),
66: filled_source(0),
67: filled_client(0) {
1.50 paf 68: }
69:
1.75 paf 70: char *VForm::strpart(const char* str, size_t len) {
71: char *result=new(PointerFreeGC) char[len+1];
1.18 paf 72: memcpy(result, str, len);
1.3 paf 73: result[len]=0;
74: return result;
75: }
76:
1.75 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:
1.75 paf 93: String::C VForm::transcode(const char* client, size_t client_size) {
94: return Charset::transcode(
95: String::C(strdup(client, client_size), client_size),
1.77 paf 96: fcharsets.client(),
97: fcharsets.source());
1.49 paf 98: }
99:
1.75 paf 100: void VForm::ParseGetFormInput(const char* query_string, size_t length) {
1.42 parser 101: ParseFormInput(query_string, length);
1.3 paf 102: }
103:
1.69 paf 104:
1.75 paf 105: static int atoi(const char* data, size_t alength) {
1.69 paf 106: char buf[MAX_STRING];
1.82 ! paf 107: size_t length=min(alength, sizeof(buf)-1);
! 108: memcpy(buf, data, length); buf[length]=0;
1.69 paf 109: return atoi(buf);
110: }
1.75 paf 111: void VForm::ParseFormInput(const char* data, size_t length) {
1.68 paf 112: // cut out ?image_map_tail
113: {
1.67 paf 114: for(size_t pos=0; pos<length; pos++) {
115: if(data[pos]=='?') {
1.69 paf 116: size_t start=pos+1;
117: size_t aftercomma=start;
118: size_t lookingcomma=start;
119: for(; lookingcomma<length; lookingcomma++) {
120: if(data[lookingcomma]==',') {
121: aftercomma=++lookingcomma;
122: break;
123: }
124: }
125:
126: if(aftercomma>start) { // ?x,y
127: int x=atoi(data+start, aftercomma-1-start);
128: int y=atoi(data+aftercomma, length-aftercomma);
1.75 paf 129: imap.put(String("x"), new VInt(x));
130: imap.put(String("y"), new VInt(y));
1.69 paf 131: } else { // ?qtail
132: AppendFormEntry("qtail", data+start, length-start);
133: }
1.67 paf 134: // cut tail
135: length=pos;
136: break;
137: }
138: }
139: }
1.68 paf 140: // Scan for pairs, unescaping and storing them as they are found
141: for(size_t pos=0; pos<length; ) {
1.16 paf 142: size_t start=pos;
1.68 paf 143: size_t finish=length;
144: for(; pos<length; pos++) {
145: if(data[pos]=='&') {
146: finish=pos++;
1.3 paf 147: break;
148: }
149: }
1.68 paf 150:
151: size_t aftereq=start;
152: size_t lookingeq=start;
153: for(; lookingeq<finish; lookingeq++) {
154: if(data[lookingeq]=='=') {
155: aftereq=++lookingeq;
1.3 paf 156: break;
157: }
158: }
1.45 paf 159:
1.75 paf 160: const char* attr=aftereq>start?unescape_chars(data+start, aftereq-1-start):"nameless";
161: char *value=unescape_chars(data+aftereq, finish-aftereq);
1.68 paf 162: AppendFormEntry(attr, value, strlen(value));
1.3 paf 163: }
164: }
165:
1.62 paf 166: static char *pa_tolower(char *s) {
167: for(char *p=s; *p; p++)
1.81 paf 168: *p=(char)tolower(*p);
1.62 paf 169: return s;
170: }
1.49 paf 171: void VForm::ParseMimeInput(
172: char *content_type,
1.75 paf 173: const char* data, size_t length) {
1.3 paf 174: /* Scan for mime-presented pairs, storing them as they are found. */
175: const char
1.62 paf 176: *boundary=pa_tolower(getAttributeValue(content_type, "boundary=", strlen(content_type))),
1.3 paf 177: *lastData=&data[length];
178: if(!boundary)
1.54 paf 179: throw Exception(0,
1.18 paf 180: 0,
1.3 paf 181: "VForm::ParseMimeInput no boundary attribute of Content-Type");
182:
183: while(true) {
1.66 paf 184: const char
1.18 paf 185: *dataStart=searchAttribute(data, boundary, lastData-data),
186: *dataEnd=searchAttribute(dataStart, boundary, lastData-dataStart);
187: size_t headerSize=getHeader(dataStart, lastData-dataStart);
1.3 paf 188:
189: if(!dataStart|!dataEnd|!headerSize) break;
1.47 paf 190: if(searchAttribute(dataStart, "content-disposition: form-data", headerSize)) {
1.16 paf 191: size_t valueSize=(dataEnd-dataStart)-headerSize-5-strlen(boundary);
1.18 paf 192: char *attr=getAttributeValue(dataStart, " name=", headerSize),
193: *fName=getAttributeValue(dataStart, " filename=", headerSize);
1.3 paf 194:
1.78 paf 195: if(attr) {
1.3 paf 196: /* OK, we have a new pair, add it to the list. */
1.80 paf 197: // fName checks are because MSIE passes unassigned <input type=file> as filename="" and empty body
198: AppendFormEntry(attr,
199: valueSize? &dataStart[headerSize+1]: "",
200: valueSize,
201: fName && (strlen(fName) || valueSize)? fName: 0);
1.3 paf 202: }
203: }
204: data=(dataEnd-strlen(boundary));
205: }
206: }
207:
1.75 paf 208: void VForm::AppendFormEntry(const char* cname_cstr,
209: const char* raw_cvalue_ptr, const size_t raw_cvalue_size,
210: const char* copy_me_file_name_cstr) {
211: const String& sname=*new String(transcode(cname_cstr, strlen(cname_cstr)));
212:
213: Value* value;
214: if(copy_me_file_name_cstr) {
215: VFile* vfile=new VFile;
1.61 paf 216: // maybe transcode text/* files?
1.75 paf 217: const String& sfile_name=*new String(strdup(copy_me_file_name_cstr));
218: vfile->set(true/*tainted*/, raw_cvalue_ptr, raw_cvalue_size, sfile_name.cstr());
1.17 paf 219: value=vfile;
220: } else {
1.75 paf 221: const char* premature_zero_pos=(const char* )memchr(raw_cvalue_ptr, 0, raw_cvalue_size);
222: size_t cvalue_size=premature_zero_pos?premature_zero_pos-(const char* )raw_cvalue_ptr
1.73 paf 223: :raw_cvalue_size;
1.75 paf 224: char *cvalue_ptr=strdup(raw_cvalue_ptr, cvalue_size);
1.49 paf 225: fix_line_breaks(cvalue_ptr, cvalue_size);
1.75 paf 226: String& string=*new String(transcode(cvalue_ptr, cvalue_size), true);
1.36 parser 227:
228: // tables
229: {
1.75 paf 230: Value* vtable=tables.get(sname);
231: if(!vtable) {
1.36 parser 232: // first appearence
1.75 paf 233: Table::columns_type columns(new ArrayString(1));
234: *columns+=new String("field");
235:
236: vtable=new VTable(new Table(columns));
237: tables.put(sname, vtable);
1.30 parser 238: }
1.75 paf 239: Table& table=*vtable->get_table();
240:
1.30 parser 241: // this string becomes next row
1.75 paf 242: Table::element_type row(new ArrayString(1));
243: *row+=&string;
244: table+=row;
1.36 parser 245: }
1.75 paf 246: value=new VString(string);
1.3 paf 247: }
1.69 paf 248:
249: fields.put_dont_replace(sname, value);
250: }
251:
1.77 paf 252: void VForm::refill_fields_and_tables() {
253: fields.clear();
254: tables.clear();
255: imap.clear();
1.75 paf 256:
1.77 paf 257: //frequest_info.query_string="a=123";
1.3 paf 258: // parsing QS [GET and ?name=value from uri rewrite)]
1.77 paf 259: if(frequest_info.query_string) {
260: size_t length=strlen(frequest_info.query_string);
261: char *buf=strdup(frequest_info.query_string, length);
1.42 parser 262: ParseGetFormInput(buf, length);
263: }
1.62 paf 264:
265: #ifdef DEBUG_POST
1.77 paf 266: frequest_info.method="POST";
1.62 paf 267: void *data;
1.80 paf 268: file_read(*new String("test.stdin"),
1.62 paf 269: data, request.post_size,
270: false/*as_text*/);
271: request.post_data=(char*)data;
1.77 paf 272: frequest_info.content_type="multipart/form-data; boundary=----------mcqY2UDNcdEAoN1mLmne2i";
1.62 paf 273:
274: #endif
1.57 paf 275:
276: // parsing POST data
1.77 paf 277: if(frequest_info.method) {
278: if(const char* content_type=frequest_info.content_type)
279: if(StrEqNc(frequest_info.method, "post", true)) {
1.18 paf 280: if(StrEqNc(content_type, "application/x-www-form-urlencoded", true))
1.77 paf 281: ParseFormInput(frequest_info.post_data, frequest_info.post_size);
1.75 paf 282: else if(StrEqNc(content_type, "multipart/form-data", 0))
283: ParseMimeInput(strdup(content_type),
1.77 paf 284: frequest_info.post_data, frequest_info.post_size);
1.3 paf 285: }
1.57 paf 286: }
1.56 paf 287:
1.77 paf 288: filled_source=&fcharsets.source();
289: filled_client=&fcharsets.client();
290: }
291:
292: bool VForm::should_refill_fields_and_tables() {
293: return &fcharsets.source()!=filled_source
294: || &fcharsets.client()!=filled_client;
1.1 paf 295: }
1.33 parser 296:
1.75 paf 297: Value* VForm::get_element(const String& aname, Value& aself, bool looking_up) {
1.77 paf 298: if(should_refill_fields_and_tables())
299: refill_fields_and_tables();
1.56 paf 300:
1.36 parser 301: // $fields
302: if(aname==FORM_FIELDS_ELEMENT_NAME)
1.75 paf 303: return new VHash(fields);
1.36 parser 304:
305: // $tables
306: if(aname==FORM_TABLES_ELEMENT_NAME)
1.75 paf 307: return new VHash(tables);
1.69 paf 308:
1.77 paf 309: // $imap
1.69 paf 310: if(aname==FORM_IMAP_ELEMENT_NAME)
1.75 paf 311: return new VHash(imap);
1.36 parser 312:
1.63 paf 313: // $method
1.75 paf 314: if(Value* result=VStateless_class::get_element(aname, aself, looking_up))
1.33 parser 315: return result;
316:
317: // $element
1.75 paf 318: return fields.get(aname);
1.72 paf 319: }
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