Annotation of parser3/src/types/pa_vform.C, revision 1.29
1.27 paf 1: /** @file
2: Parser: @b form class.
1.10 paf 3:
1.3 paf 4: Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com)
1.10 paf 5:
1.3 paf 6: Author: Alexander Petrosyan <paf@design.ru>(http://design.ru/paf)
1.1 paf 7:
1.29 ! parser 8: $Id: pa_vform.C,v 1.28 2001/04/28 08:44:15 paf Exp $
1.1 paf 9:
1.15 paf 10:
11: based on The CGI_C library, by Thomas Boutell.
1.3 paf 12: */
13:
1.14 paf 14: #include "pa_sapi.h"
1.1 paf 15: #include "pa_vform.h"
16: #include "pa_vstring.h"
1.3 paf 17: #include "pa_globals.h"
18: #include "pa_request.h"
1.9 paf 19: #include "pa_vfile.h"
1.21 paf 20: #include "pa_common.h"
1.3 paf 21:
22: // parse helper funcs
23:
1.18 paf 24: static size_t getHeader(const char *data, size_t len){
1.25 paf 25: size_t i;
26: int enter=-1;
1.3 paf 27: if (data)
28: for (i=0;i<len;i++)
29: if (data[i]=='\n'){
30: if (enter>=0) enter++;
31: if (enter>1) return i;
32: } else if (data[i]!='\r') enter=0;
33: return 0;
34: }
35:
1.18 paf 36: static const char *searchAttribute(const char *data, const char *attr, size_t len){
1.16 paf 37: size_t i;
1.3 paf 38: if (data)
39: for (i=0;i<len;i++)
40: if (tolower(data[i])==*attr){
1.16 paf 41: size_t j;
1.3 paf 42: for (j=i+1;j<=len;j++)
43: if (!attr[j-i]) return &data[j];
44: else {
45: if (j==len) break;
46: if (attr[j-i]!=tolower(data[j])) break;
47: }
48: }
49: return NULL;
50: }
51:
52: // VForm
53:
1.16 paf 54: char *VForm::strpart(const char *str, size_t len) {
1.7 paf 55: char *result=(char *)malloc(len+1);
1.3 paf 56: if (!result) return NULL;
1.18 paf 57: memcpy(result, str, len);
1.3 paf 58: result[len]=0;
59: return result;
60: }
61:
1.18 paf 62: char *VForm::getAttributeValue(const char *data, char *attr, size_t len) {
63: const char *value=searchAttribute(data, attr, len);
1.3 paf 64: if (value){
1.18 paf 65: size_t i;
66: if (!(len-=value-data)) return NULL;
67: if (*value=='"') {
68: for (i=1;i<len;i++) if (value[i]=='"') break;
69: return strpart(&value[1], i-1);
70: } else {
71: for (i=0;i<len;i++) if (strchr(" ;\"\n\r", value[i])) break;
72: return strpart(value, i);
73: }
1.3 paf 74: }
75: return NULL;
76: }
77:
78: void VForm::ParseGetFormInput(const char *query_string) {
79: ParseFormInput(query_string, strlen(query_string));
80: }
81:
1.16 paf 82: void VForm::ParseFormInput(const char *data, size_t length) {
1.8 paf 83: /* Scan for pairs, unescaping and storing them as they are found. */
1.16 paf 84: size_t pos=0;
1.3 paf 85: while(pos !=length) {
1.16 paf 86: size_t foundEq=0;
87: size_t foundAmp=0;
88: size_t start=pos;
89: size_t len=0;
1.3 paf 90: while(pos !=length) {
91: if(data[pos]=='=') {
92: foundEq=1;
93: pos++;
94: break;
95: }
96: pos++;
97: len++;
98: }
99: if(!foundEq)
100: break;
1.6 paf 101: const char *attr=unescape_chars(pool(), data+start, len);
1.3 paf 102: start=pos;
103: len=0;
104: while(pos !=length) {
105: if(data[pos]=='&') {
106: foundAmp=1;
107: pos++;
108: break;
109: }
110: pos++;
111: len++;
112: }
113: /* The last pair probably won't be followed by a &, but
114: that's fine, so check for that after accepting it */
1.6 paf 115: const char *value=unescape_chars(pool(), data+start, len);
1.3 paf 116: /* OK, we have a new pair, add it to the list. */
117: AppendFormEntry(attr, value);
118: if(!foundAmp)
119: break;
120: }
121: }
122:
123: void VForm::ParseMimeInput(const char *content_type,
1.16 paf 124: const char *data, size_t length) {
1.3 paf 125: /* Scan for mime-presented pairs, storing them as they are found. */
126: const char
1.18 paf 127: *boundary=getAttributeValue(content_type, "boundary=", strlen(content_type)),
1.3 paf 128: *lastData=&data[length];
129: if(!boundary)
1.18 paf 130: THROW(0, 0,
131: 0,
1.3 paf 132: "VForm::ParseMimeInput no boundary attribute of Content-Type");
133:
134: while(true) {
135: const char
1.18 paf 136: *dataStart=searchAttribute(data, boundary, lastData-data),
137: *dataEnd=searchAttribute(dataStart, boundary, lastData-dataStart);
138: size_t headerSize=getHeader(dataStart, lastData-dataStart);
1.3 paf 139:
140: if(!dataStart|!dataEnd|!headerSize) break;
1.18 paf 141: if(searchAttribute(dataStart, "content-disposition: form-data", headerSize)){
1.16 paf 142: size_t valueSize=(dataEnd-dataStart)-headerSize-5-strlen(boundary);
1.18 paf 143: char *attr=getAttributeValue(dataStart, " name=", headerSize),
144: *fName=getAttributeValue(dataStart, " filename=", headerSize);
1.3 paf 145:
146: if(attr && valueSize){
147: /* OK, we have a new pair, add it to the list. */
148: AppendFormEntry(attr, &dataStart[headerSize+1], valueSize, fName);
149: }
150: }
151: data=(dataEnd-strlen(boundary));
152: }
153: }
154:
1.7 paf 155: void VForm::AppendFormEntry(const char *aname,
1.18 paf 156: const char *value_ptr, size_t value_size,
1.3 paf 157: const char *file_name) {
1.7 paf 158: String& sname=*NEW String(pool(), aname);
1.3 paf 159:
160: Value *value;
1.17 paf 161: if(file_name) {
162: VFile *vfile=NEW VFile(pool());
1.22 paf 163: vfile->set(true/*tainted*/, value_ptr, value_size, file_name);
1.17 paf 164: value=vfile;
165: } else {
1.3 paf 166: String& string=*NEW String(pool());
167: string.APPEND_TAINTED(value_ptr, value_size, "form", 0);
168: value=NEW VString(string);
169: }
170:
171: fields.put(sname, value);
172: }
1.1 paf 173:
1.26 paf 174: /// @todo parse input letter if some switch is on
1.21 paf 175: void VForm::fill_fields(Request& request) {
1.20 paf 176: //AppendFormEntry("fs", "<1!2>", 5, 0);
1.3 paf 177: // parsing QS [GET and ?name=value from uri rewrite)]
178: if(request.info.query_string)
179: ParseGetFormInput(request.info.query_string);
180: // parsing POSTed data
1.4 paf 181: if(request.info.method) {
1.3 paf 182: if(const char *content_type=request.info.content_type)
1.18 paf 183: if(StrEqNc(request.info.method, "post", true)) {
184: if(StrEqNc(content_type, "application/x-www-form-urlencoded", true))
1.21 paf 185: ParseFormInput(request.post_data, request.post_size);
1.18 paf 186: else if(StrEqNc(content_type, "multipart/form-data", 0))
1.21 paf 187: ParseMimeInput(content_type, request.post_data, request.post_size);
1.3 paf 188: }
189: } else
1.21 paf 190: ; // letter?
1.1 paf 191: }
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