Annotation of parser3/src/types/pa_vform.C, revision 1.36
1.27 paf 1: /** @file
2: Parser: @b form class.
1.36 ! parser 3: based on The CGI_C library, by Thomas Boutell.
1.10 paf 4:
1.3 paf 5: Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com)
1.10 paf 6:
1.3 paf 7: Author: Alexander Petrosyan <paf@design.ru>(http://design.ru/paf)
1.1 paf 8:
1.36 ! parser 9: $Id: pa_vform.C,v 1.33.2.3 2001/09/08 16:00:15 parser Exp $
1.3 paf 10: */
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"
1.3 paf 20:
21: // parse helper funcs
22:
1.18 paf 23: static size_t getHeader(const char *data, size_t len){
1.25 paf 24: size_t i;
25: int enter=-1;
1.3 paf 26: if (data)
27: for (i=0;i<len;i++)
28: if (data[i]=='\n'){
29: if (enter>=0) enter++;
30: if (enter>1) return i;
31: } else if (data[i]!='\r') enter=0;
32: return 0;
33: }
34:
1.18 paf 35: static const char *searchAttribute(const char *data, const char *attr, size_t len){
1.16 paf 36: size_t i;
1.3 paf 37: if (data)
38: for (i=0;i<len;i++)
39: if (tolower(data[i])==*attr){
1.16 paf 40: size_t j;
1.3 paf 41: for (j=i+1;j<=len;j++)
42: if (!attr[j-i]) return &data[j];
43: else {
44: if (j==len) break;
45: if (attr[j-i]!=tolower(data[j])) break;
46: }
47: }
48: return NULL;
49: }
50:
51: // VForm
52:
1.16 paf 53: char *VForm::strpart(const char *str, size_t len) {
1.7 paf 54: char *result=(char *)malloc(len+1);
1.3 paf 55: if (!result) return NULL;
1.18 paf 56: memcpy(result, str, len);
1.3 paf 57: result[len]=0;
58: return result;
59: }
60:
1.18 paf 61: char *VForm::getAttributeValue(const char *data, char *attr, size_t len) {
62: const char *value=searchAttribute(data, attr, len);
1.3 paf 63: if (value){
1.18 paf 64: size_t i;
65: if (!(len-=value-data)) return NULL;
66: if (*value=='"') {
67: for (i=1;i<len;i++) if (value[i]=='"') break;
68: return strpart(&value[1], i-1);
69: } else {
70: for (i=0;i<len;i++) if (strchr(" ;\"\n\r", value[i])) break;
71: return strpart(value, i);
72: }
1.3 paf 73: }
74: return NULL;
75: }
76:
77: void VForm::ParseGetFormInput(const char *query_string) {
78: ParseFormInput(query_string, strlen(query_string));
79: }
80:
1.16 paf 81: void VForm::ParseFormInput(const char *data, size_t length) {
1.8 paf 82: /* Scan for pairs, unescaping and storing them as they are found. */
1.16 paf 83: size_t pos=0;
1.3 paf 84: while(pos !=length) {
1.16 paf 85: size_t foundEq=0;
86: size_t foundAmp=0;
87: size_t start=pos;
88: size_t len=0;
1.3 paf 89: while(pos !=length) {
90: if(data[pos]=='=') {
91: foundEq=1;
92: pos++;
93: break;
94: }
95: pos++;
96: len++;
97: }
98: if(!foundEq)
99: break;
1.6 paf 100: const char *attr=unescape_chars(pool(), data+start, len);
1.3 paf 101: start=pos;
102: len=0;
103: while(pos !=length) {
104: if(data[pos]=='&') {
105: foundAmp=1;
106: pos++;
107: break;
108: }
109: pos++;
110: len++;
111: }
112: /* The last pair probably won't be followed by a &, but
113: that's fine, so check for that after accepting it */
1.6 paf 114: const char *value=unescape_chars(pool(), data+start, len);
1.3 paf 115: /* OK, we have a new pair, add it to the list. */
116: AppendFormEntry(attr, value);
117: if(!foundAmp)
118: break;
119: }
120: }
121:
122: void VForm::ParseMimeInput(const char *content_type,
1.16 paf 123: const char *data, size_t length) {
1.3 paf 124: /* Scan for mime-presented pairs, storing them as they are found. */
125: const char
1.18 paf 126: *boundary=getAttributeValue(content_type, "boundary=", strlen(content_type)),
1.3 paf 127: *lastData=&data[length];
128: if(!boundary)
1.18 paf 129: THROW(0, 0,
130: 0,
1.3 paf 131: "VForm::ParseMimeInput no boundary attribute of Content-Type");
132:
133: while(true) {
134: const char
1.18 paf 135: *dataStart=searchAttribute(data, boundary, lastData-data),
136: *dataEnd=searchAttribute(dataStart, boundary, lastData-dataStart);
137: size_t headerSize=getHeader(dataStart, lastData-dataStart);
1.3 paf 138:
139: if(!dataStart|!dataEnd|!headerSize) break;
1.18 paf 140: if(searchAttribute(dataStart, "content-disposition: form-data", headerSize)){
1.16 paf 141: size_t valueSize=(dataEnd-dataStart)-headerSize-5-strlen(boundary);
1.18 paf 142: char *attr=getAttributeValue(dataStart, " name=", headerSize),
143: *fName=getAttributeValue(dataStart, " filename=", headerSize);
1.3 paf 144:
145: if(attr && valueSize){
146: /* OK, we have a new pair, add it to the list. */
147: AppendFormEntry(attr, &dataStart[headerSize+1], valueSize, fName);
148: }
149: }
150: data=(dataEnd-strlen(boundary));
151: }
152: }
153:
1.7 paf 154: void VForm::AppendFormEntry(const char *aname,
1.18 paf 155: const char *value_ptr, size_t value_size,
1.3 paf 156: const char *file_name) {
1.7 paf 157: String& sname=*NEW String(pool(), aname);
1.3 paf 158:
159: Value *value;
1.17 paf 160: if(file_name) {
161: VFile *vfile=NEW VFile(pool());
1.22 paf 162: vfile->set(true/*tainted*/, value_ptr, value_size, file_name);
1.17 paf 163: value=vfile;
164: } else {
1.3 paf 165: String& string=*NEW String(pool());
166: string.APPEND_TAINTED(value_ptr, value_size, "form", 0);
1.36 ! parser 167:
! 168: // tables
! 169: {
! 170: Value *valready=(Value *)tables.get(sname);
! 171: bool existed=valready!=0;
! 172: Table *table;
! 173: if(existed) {
! 174: // second+ appearence
! 175: table=valready->get_table();
! 176: } else {
! 177: // first appearence
1.30 parser 178: Array& columns=*NEW Array(pool(), 1);
1.36 ! parser 179: columns+=NEW String(pool(), "field");
1.30 parser 180: table=NEW Table(pool(), 0, &columns);
181: }
182: // this string becomes next row
183: Array& row=*NEW Array(pool(), 1);
184: row+=&string;
185: *table+=&row;
1.36 ! parser 186: // not existed before? add it
! 187: if(!existed)
! 188: tables.put(sname, NEW VTable(pool(), table));
! 189: }
! 190: value=NEW VString(string);
1.3 paf 191: }
192:
1.32 parser 193: fields.put_dont_replace(sname, value);
1.3 paf 194: }
1.1 paf 195:
1.26 paf 196: /// @todo parse input letter if some switch is on
1.36 ! parser 197: void VForm::fill_fields_and_tables(Request& request) {
1.3 paf 198: // parsing QS [GET and ?name=value from uri rewrite)]
199: if(request.info.query_string)
200: ParseGetFormInput(request.info.query_string);
201: // parsing POSTed data
1.4 paf 202: if(request.info.method) {
1.3 paf 203: if(const char *content_type=request.info.content_type)
1.18 paf 204: if(StrEqNc(request.info.method, "post", true)) {
205: if(StrEqNc(content_type, "application/x-www-form-urlencoded", true))
1.21 paf 206: ParseFormInput(request.post_data, request.post_size);
1.18 paf 207: else if(StrEqNc(content_type, "multipart/form-data", 0))
1.21 paf 208: ParseMimeInput(content_type, request.post_data, request.post_size);
1.3 paf 209: }
210: } else
1.21 paf 211: ; // letter?
1.1 paf 212: }
1.33 parser 213:
214: Value *VForm::get_element(const String& aname) {
1.36 ! parser 215: // $fields
! 216: if(aname==FORM_FIELDS_ELEMENT_NAME)
! 217: return NEW VHash(pool(), Hash(fields));
! 218:
! 219: // $tables
! 220: if(aname==FORM_TABLES_ELEMENT_NAME)
! 221: return NEW VHash(pool(), Hash(tables));
! 222:
1.33 parser 223: // $CLASS,$method
224: if(Value *result=VStateless_class::get_element(aname))
225: return result;
226:
227: // $element
228: return static_cast<Value *>(fields.get(aname));
229: }
230:
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