| 1 | package jrw; |
| 2 | |
| 3 | import java.util.*; |
| 4 | import java.util.function.*; |
| 5 | import java.io.*; |
| 6 | import java.nio.*; |
| 7 | import java.nio.channels.*; |
| 8 | |
| 9 | public class FormData extends HashMap<String, String> { |
| 10 | public static final int MAX_LENGTH = 1 << 20; |
| 11 | |
| 12 | private static int htoi(byte hex) { |
| 13 | if((hex >= '0') && (hex <= '9')) |
| 14 | return(hex - '0'); |
| 15 | if((hex >= 'A') && (hex <= 'F')) |
| 16 | return(hex - 'A' + 10); |
| 17 | if((hex >= 'a') && (hex <= 'f')) |
| 18 | return(hex - 'a' + 10); |
| 19 | return(0); |
| 20 | } |
| 21 | |
| 22 | private static ByteBuffer unquoteb(ByteBuffer part) { |
| 23 | ByteBuffer ret = ByteBuffer.allocate(part.remaining()); |
| 24 | while(part.remaining() > 0) { |
| 25 | int b = part.get() & 0xff; |
| 26 | if((b == '%') && (part.remaining() >= 2)) { |
| 27 | int n1 = htoi(part.get()), n2 = htoi(part.get()); |
| 28 | ret.put((byte)((n1 << 4) | n2)); |
| 29 | } else { |
| 30 | ret.put((byte)b); |
| 31 | } |
| 32 | } |
| 33 | ret.flip(); |
| 34 | return(ret); |
| 35 | } |
| 36 | |
| 37 | private static String unquote(ByteBuffer part) { |
| 38 | ByteBuffer dec = unquoteb(part); |
| 39 | try { |
| 40 | return(Http.UTF8.newDecoder().decode(dec.duplicate()).toString()); |
| 41 | } catch(java.nio.charset.CharacterCodingException e) { |
| 42 | return(Http.LATIN1.decode(dec).toString()); |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | private static String unquote(String part) { |
| 47 | if(part.indexOf('%') < 0) |
| 48 | return(part); |
| 49 | return(unquote(Http.UTF8.encode(CharBuffer.wrap(part)))); |
| 50 | } |
| 51 | |
| 52 | public static void parse(Map<? super String, ? super String> buf, ByteBuffer data) { |
| 53 | int p = data.position(), p2, p3; |
| 54 | while(p < data.limit()) { |
| 55 | for(p2 = p; (p2 < data.limit()) && (data.get(p2) != '&'); p2++); |
| 56 | for(p3 = p; (p3 < p2) && (data.get(p3) != '='); p3++); |
| 57 | if(p3 < p2) { |
| 58 | buf.put(unquote((ByteBuffer)data.duplicate().position(p).limit(p3)), |
| 59 | unquote((ByteBuffer)data.duplicate().position(p3 + 1).limit(p2))); |
| 60 | } |
| 61 | p = p2 + 1; |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | public static void parse(Map<? super String, ? super String> buf, String data) { |
| 66 | int p = 0; |
| 67 | while(true) { |
| 68 | int p2 = data.indexOf('&', p); |
| 69 | String part = (p2 < 0) ? data.substring(p) : data.substring(p, p2); |
| 70 | int p3 = part.indexOf('='); |
| 71 | if(p3 >= 0) |
| 72 | buf.put(unquote(part.substring(0, p3)), unquote(part.substring(p3 + 1))); |
| 73 | if(p2 < 0) |
| 74 | break; |
| 75 | p = p2 + 1; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | public static FormData read(Request req) { |
| 80 | FormData ret = new FormData(); |
| 81 | String query = (String)req.env.get("QUERY_STRING"); |
| 82 | if(query != null) |
| 83 | parse(ret, query); |
| 84 | if(req.ihead("Content-Type", "").equals("application/x-www-form-urlencoded")) { |
| 85 | int max = MAX_LENGTH; |
| 86 | String clen = req.ihead("Content-Length", null); |
| 87 | if(clen != null) { |
| 88 | try { |
| 89 | max = Math.min(max, Integer.parseInt(clen)); |
| 90 | } catch(NumberFormatException e) { |
| 91 | } |
| 92 | } |
| 93 | ReadableByteChannel in = (ReadableByteChannel)req.env.get("jagi.input"); |
| 94 | if(in instanceof SelectableChannel) { |
| 95 | try { |
| 96 | ((SelectableChannel)in).configureBlocking(true); |
| 97 | } catch(IOException e) { |
| 98 | } |
| 99 | } |
| 100 | ByteBuffer buf = ByteBuffer.allocate(65536); |
| 101 | while(buf.position() < max) { |
| 102 | if(buf.remaining() == 0) { |
| 103 | ByteBuffer n = ByteBuffer.allocate(Math.min(buf.capacity() * 2, max)); |
| 104 | buf.flip(); |
| 105 | n.put(buf); |
| 106 | buf = n; |
| 107 | } |
| 108 | try { |
| 109 | int rv = in.read(buf); |
| 110 | if(rv <= 0) |
| 111 | break; |
| 112 | } catch(IOException e) { |
| 113 | break; |
| 114 | } |
| 115 | } |
| 116 | buf.flip(); |
| 117 | parse(ret, buf); |
| 118 | } |
| 119 | return(ret); |
| 120 | } |
| 121 | |
| 122 | public static FormData get(Request req) { |
| 123 | FormData ret = (FormData)req.env.get(FormData.class); |
| 124 | if(ret == null) |
| 125 | req.env.put(FormData.class, ret = read(req)); |
| 126 | return(ret); |
| 127 | } |
| 128 | |
| 129 | static class Collector extends ByteArrayOutputStream { |
| 130 | final FormData form = new FormData(); |
| 131 | final Request req; |
| 132 | |
| 133 | Collector(Request req) { |
| 134 | this.req = req; |
| 135 | req.env.put(FormData.class, this.form); |
| 136 | String query = (String)req.env.get("QUERY_STRING"); |
| 137 | if(query != null) |
| 138 | parse(form, query); |
| 139 | } |
| 140 | |
| 141 | public void write(int b) { |
| 142 | if(count < MAX_LENGTH) |
| 143 | super.write(b); |
| 144 | } |
| 145 | |
| 146 | public void write(byte[] buf, int off, int len) { |
| 147 | len = Math.min(len, MAX_LENGTH - count); |
| 148 | if(len > 0) |
| 149 | super.write(buf, off, len); |
| 150 | } |
| 151 | |
| 152 | public void close() { |
| 153 | parse(form, ByteBuffer.wrap(toByteArray())); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | public static Map<Object, Object> feed(Request req, Handler next) { |
| 158 | Map<Object, Object> resp = new HashMap<>(); |
| 159 | if(req.ihead("Content-Type", "").equals("application/x-www-form-urlencoded")) { |
| 160 | resp.put("jagi.status", "feed-input"); |
| 161 | resp.put("jagi.next", (Function<Map<Object, Object>, Map<Object, Object>>)env -> Dispatch.handle(next, req)); |
| 162 | resp.put("jagi.input-sink", new Collector(req)); |
| 163 | } else { |
| 164 | read(req); |
| 165 | resp.put("jagi.status", "chain"); |
| 166 | resp.put("jagi.next", (Function<Map<Object, Object>, Map<Object, Object>>)env -> Dispatch.handle(next, req)); |
| 167 | } |
| 168 | return(resp); |
| 169 | } |
| 170 | } |