| 1 | package dolda.jsvc.util; |
| 2 | |
| 3 | import dolda.jsvc.*; |
| 4 | import java.util.*; |
| 5 | import java.io.*; |
| 6 | import java.net.*; |
| 7 | import java.nio.charset.CharacterCodingException; |
| 8 | |
| 9 | public class Params { |
| 10 | public static class EncodingException extends ClientError { |
| 11 | public EncodingException(String msg) { |
| 12 | super("Invalid parameter encoding", msg); |
| 13 | } |
| 14 | } |
| 15 | |
| 16 | public static MultiMap<String, String> urlparams(Reader in) throws IOException { |
| 17 | try { |
| 18 | MultiMap<String, String> ret = new WrappedMultiMap<String, String>(new TreeMap<String, Collection<String>>()); |
| 19 | String st = "key"; |
| 20 | String key = null; /* Java is stupid. */ |
| 21 | MixedBuffer buf = new MixedBuffer(); |
| 22 | while(true) { |
| 23 | int c = in.read(); |
| 24 | if(st == "key") { |
| 25 | if(c == '%') { |
| 26 | try { |
| 27 | int d1 = in.read(); |
| 28 | int d2 = in.read(); |
| 29 | buf.append((byte)((Misc.hex2int((char)d1) << 4) | Misc.hex2int((char)d2))); |
| 30 | } catch(NumberFormatException e) { |
| 31 | throw(new EncodingException("Invalid character escape")); |
| 32 | } |
| 33 | } else if(c == '=') { |
| 34 | key = buf.convert(); |
| 35 | buf = new MixedBuffer(); |
| 36 | st = "val"; |
| 37 | } else if(c == '&') { |
| 38 | ret.add(buf.convert(), ""); |
| 39 | buf = new MixedBuffer(); |
| 40 | } else if(c == -1) { |
| 41 | if(buf.size() == 0) { |
| 42 | break; |
| 43 | } else { |
| 44 | ret.add(buf.convert(), ""); |
| 45 | buf = new MixedBuffer(); |
| 46 | } |
| 47 | } else { |
| 48 | buf.append((char)c); |
| 49 | } |
| 50 | } else if(st == "val") { |
| 51 | if(c == '%') { |
| 52 | try { |
| 53 | int d1 = in.read(); |
| 54 | int d2 = in.read(); |
| 55 | buf.append((byte)((Misc.hex2int((char)d1) << 4) | Misc.hex2int((char)d2))); |
| 56 | } catch(NumberFormatException e) { |
| 57 | throw(new EncodingException("Invalid character escape")); |
| 58 | } |
| 59 | } else if((c == '&') || (c == -1)) { |
| 60 | ret.add(key, buf.convert()); |
| 61 | buf = new MixedBuffer(); |
| 62 | st = "key"; |
| 63 | } else if(c == '+') { |
| 64 | buf.append(' '); |
| 65 | } else { |
| 66 | buf.append((char)c); |
| 67 | } |
| 68 | } |
| 69 | } |
| 70 | return(ret); |
| 71 | } catch(CharacterCodingException e) { |
| 72 | throw(new EncodingException("Escaped parameter text is not proper UTF-8")); |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | public static MultiMap<String, String> urlparams(String q) { |
| 77 | try { |
| 78 | return(urlparams(new StringReader(q))); |
| 79 | } catch(IOException e) { |
| 80 | /* This will, of course, never ever once happen, but do |
| 81 | * you think Javac cares? */ |
| 82 | throw(new Error(e)); |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | public static MultiMap<String, String> urlparams(URL url) { |
| 87 | String q = url.getQuery(); |
| 88 | if(q == null) |
| 89 | q = ""; |
| 90 | return(urlparams(q)); |
| 91 | } |
| 92 | |
| 93 | public static MultiMap<String, String> urlparams(Request req) { |
| 94 | return(urlparams(req.url())); |
| 95 | } |
| 96 | |
| 97 | public static String encquery(Map<String, String> pars) { |
| 98 | StringBuilder buf = new StringBuilder(); |
| 99 | boolean f = true; |
| 100 | for(Map.Entry<String, String> par : pars.entrySet()) { |
| 101 | if(!f) |
| 102 | buf.append('&'); |
| 103 | buf.append(Misc.urlq(par.getKey())); |
| 104 | buf.append('='); |
| 105 | buf.append(Misc.urlq(par.getValue())); |
| 106 | f = false; |
| 107 | } |
| 108 | return(buf.toString()); |
| 109 | } |
| 110 | |
| 111 | public static MultiMap<String, String> postparams(Request req) { |
| 112 | if(req.method() != "POST") |
| 113 | return(null); |
| 114 | String ctype = req.inheaders().get("Content-Type"); |
| 115 | if(ctype == null) |
| 116 | return(null); |
| 117 | ctype = ctype.toLowerCase(); |
| 118 | if(ctype.equals("application/x-www-form-urlencoded")) { |
| 119 | byte[] data; |
| 120 | try { |
| 121 | return(urlparams(new InputStreamReader(req.input(), "UTF-8"))); |
| 122 | } catch(IOException e) { |
| 123 | return(null); |
| 124 | } |
| 125 | } |
| 126 | return(null); |
| 127 | } |
| 128 | |
| 129 | public static MultiMap<String, String> stdparams(Request req) { |
| 130 | MultiMap<String, String> params = Params.urlparams(req); |
| 131 | if(req.method() == "POST") { |
| 132 | MultiMap<String, String> pp = Params.postparams(req); |
| 133 | if(pp != null) |
| 134 | params.putAll(pp); |
| 135 | } |
| 136 | return(params); |
| 137 | } |
| 138 | } |