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1 // Return a single-proxy result, which encodes ALL the arguments that were | |
2 // passed to FindProxyForURL(). | |
3 | |
4 function FindProxyForURL(url, host) { | |
5 if (arguments.length != 2) { | |
6 throw "Wrong number of arguments passed to FindProxyForURL!"; | |
7 return "FAIL"; | |
8 } | |
9 | |
10 return "PROXY " + makePseudoHost(url + "." + host); | |
11 } | |
12 | |
13 // Form a string that kind-of resembles a host. We will replace any | |
14 // non-alphanumeric character with a dot, then fix up the oddly placed dots. | |
15 function makePseudoHost(str) { | |
16 var result = ""; | |
17 | |
18 for (var i = 0; i < str.length; ++i) { | |
19 var c = str.charAt(i); | |
20 if (!isValidPseudoHostChar(c)) { | |
21 c = '.'; // Replace unsupported characters with a dot. | |
22 } | |
23 | |
24 // Take care not to place multiple adjacent dots, | |
25 // a dot at the beginning, or a dot at the end. | |
26 if (c == '.' && | |
27 (result.length == 0 || | |
28 i == str.length - 1 || | |
29 result.charAt(result.length - 1) == '.')) { | |
30 continue; | |
31 } | |
32 result += c; | |
33 } | |
34 return result; | |
35 } | |
36 | |
37 function isValidPseudoHostChar(c) { | |
38 if (c >= '0' && c <= '9') | |
39 return true; | |
40 if (c >= 'a' && c <= 'z') | |
41 return true; | |
42 if (c >= 'A' && c <= 'Z') | |
43 return true; | |
44 return false; | |
45 } | |
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