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1.10 paf 1: /**
2: Parser: form class.
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:
1.11 ! paf 8: $Id: pa_vform.C,v 1.10.2.1 2001/03/21 13:57:35 paf Exp $
1.1 paf 9: */
10:
1.7 paf 11: /**
1.10 paf 12: @todo based on cgic by ?
1.3 paf 13: */
14:
15: #include <ctype.h>
16: #include <string.h>
17:
1.1 paf 18: #include "pa_vform.h"
19: #include "pa_vstring.h"
1.3 paf 20: #include "pa_globals.h"
21: #include "pa_request.h"
1.9 paf 22: #include "pa_vfile.h"
1.3 paf 23:
24: // parse helper funcs
25:
26: static bool StrEqNc(const char *s1, const char *s2, bool strict) {
27: while(true) {
28: if(!(*s1)) {
29: if(!(*s2))
30: return true;
31: else
32: return !strict;
33: } else if(!(*s2))
34: return !strict;
35: if(isalpha(*s1)) {
36: if(tolower(*s1) !=tolower(*s2))
37: return false;
38: } else if((*s1) !=(*s2))
39: return false;
40: s1++;
41: s2++;
42: }
43: }
44:
45: static int getHeader(const char *data,int len){
46: int i,enter=-1;
47: if (data)
48: for (i=0;i<len;i++)
49: if (data[i]=='\n'){
50: if (enter>=0) enter++;
51: if (enter>1) return i;
52: } else if (data[i]!='\r') enter=0;
53: return 0;
54: }
55:
56: static const char *searchAttribute(const char *data,const char *attr,int len){
57: int i;
58: if (data)
59: for (i=0;i<len;i++)
60: if (tolower(data[i])==*attr){
61: int j;
62: for (j=i+1;j<=len;j++)
63: if (!attr[j-i]) return &data[j];
64: else {
65: if (j==len) break;
66: if (attr[j-i]!=tolower(data[j])) break;
67: }
68: }
69: return NULL;
70: }
71:
72: // VForm
73:
74: char *VForm::strpart(const char *str, int len) {
1.7 paf 75: char *result=(char *)malloc(len+1);
1.3 paf 76: if (!result) return NULL;
77: memcpy(result,str,len);
78: result[len]=0;
79: return result;
80: }
81:
82: char *VForm::getAttributeValue(const char *data,char *attr,int len) {
83: const char *value=searchAttribute(data,attr,len);
84: if (value){
85: int i;
86: if (!(len-=value-data)) return NULL;
87: if (*value=='"') {
88: for (i=1;i<len;i++) if (value[i]=='"') break;
89: return strpart(&value[1],i-1);
90: } else {
91: for (i=0;i<len;i++) if (strchr(" ;\"\n\r",value[i])) break;
92: return strpart(value,i);
93: }
94: }
95: return NULL;
96: }
97:
98: void VForm::ParseGetFormInput(const char *query_string) {
99: ParseFormInput(query_string, strlen(query_string));
100: }
101:
102: void VForm::ParsePostFormInput(const char *content_type, int post_size,
103: bool mime_mode) {
104: char *input;
105: if(!post_size)
106: return;
107:
108: input=(char *) malloc(post_size);
1.11 ! paf 109: int read_size=(*service_funcs.read_post)(pool(), input, post_size);
1.3 paf 110: if(read_size !=post_size)
111: THROW(0, 0,
112: 0,
113: "ParsePostFormInput: post_size(%d)!=read_size(%d)",
114: post_size, read_size);
115:
116: if(mime_mode)
117: ParseMimeInput(content_type, input, post_size);
118: else
119: ParseFormInput(input, post_size);
120: }
121:
122: void VForm::ParseFormInput(const char *data, int length) {
1.8 paf 123: /* Scan for pairs, unescaping and storing them as they are found. */
1.3 paf 124: int pos=0;
125: while(pos !=length) {
126: int foundEq=0;
127: int foundAmp=0;
128: int start=pos;
129: int len=0;
130: while(pos !=length) {
131: if(data[pos]=='=') {
132: foundEq=1;
133: pos++;
134: break;
135: }
136: pos++;
137: len++;
138: }
139: if(!foundEq)
140: break;
1.6 paf 141: const char *attr=unescape_chars(pool(), data+start, len);
1.3 paf 142: start=pos;
143: len=0;
144: while(pos !=length) {
145: if(data[pos]=='&') {
146: foundAmp=1;
147: pos++;
148: break;
149: }
150: pos++;
151: len++;
152: }
153: /* The last pair probably won't be followed by a &, but
154: that's fine, so check for that after accepting it */
1.6 paf 155: const char *value=unescape_chars(pool(), data+start, len);
1.3 paf 156: /* OK, we have a new pair, add it to the list. */
157: AppendFormEntry(attr, value);
158: if(!foundAmp)
159: break;
160: }
161: }
162:
163: void VForm::ParseMimeInput(const char *content_type,
1.8 paf 164: const char *data, int length) {
1.3 paf 165: /* Scan for mime-presented pairs, storing them as they are found. */
166: const char
167: *boundary=getAttributeValue(content_type,"boundary=",strlen(content_type)),
168: *lastData=&data[length];
169: if(!boundary)
170: THROW(0,0,
171: 0,
172: "VForm::ParseMimeInput no boundary attribute of Content-Type");
173:
174: while(true) {
175: const char
176: *dataStart=searchAttribute(data,boundary,lastData-data),
177: *dataEnd=searchAttribute(dataStart,boundary,lastData-dataStart);
178: int headerSize=getHeader(dataStart,lastData-dataStart);
179:
180: if(!dataStart|!dataEnd|!headerSize) break;
181: if(searchAttribute(dataStart,"content-disposition: form-data",headerSize)){
182: int valueSize=(dataEnd-dataStart)-headerSize-5-strlen(boundary);
183: char *attr=getAttributeValue(dataStart," name=",headerSize),
184: *fName=getAttributeValue(dataStart," filename=",headerSize);
185:
186: if(attr && valueSize){
187: /* OK, we have a new pair, add it to the list. */
188: AppendFormEntry(attr, &dataStart[headerSize+1], valueSize, fName);
189: }
190: }
191: data=(dataEnd-strlen(boundary));
192: }
193: }
194:
1.7 paf 195: void VForm::AppendFormEntry(const char *aname,
1.3 paf 196: const char *value_ptr, int value_size,
197: const char *file_name) {
1.7 paf 198: String& sname=*NEW String(pool(), aname);
1.3 paf 199:
200: Value *value;
201: if(file_name)
1.9 paf 202: value=NEW VFile(pool(),
203: value_ptr, value_size,
204: file_name);
1.3 paf 205: else {
206: String& string=*NEW String(pool());
207: string.APPEND_TAINTED(value_ptr, value_size, "form", 0);
208: value=NEW VString(string);
209: }
210:
211: fields.put(sname, value);
212: }
1.1 paf 213:
1.6 paf 214: void VForm::fill_fields(Request& request, int post_max_size) {
1.3 paf 215: // parsing QS [GET and ?name=value from uri rewrite)]
216: if(request.info.query_string)
217: ParseGetFormInput(request.info.query_string);
218: // parsing POSTed data
1.4 paf 219: if(request.info.method) {
1.3 paf 220: if(const char *content_type=request.info.content_type)
1.4 paf 221: if(StrEqNc(request.info.method, "post",true)) {
1.3 paf 222: int post_size=max(0, min(request.info.content_length, post_max_size));
223: if(StrEqNc(content_type, "application/x-www-form-urlencoded",true))
224: ParsePostFormInput(content_type, post_size, false);
225: else if(StrEqNc(content_type, "multipart/form-data",0))
226: ParsePostFormInput(content_type, post_size, true);
227: }
228: } else
229: ; // TODO: разобрать пришедшее письмо, если какой ключик выставлен?
1.1 paf 230: }