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73785268 NR |
1 | package be.nikiroo.gofetch; |
2 | ||
3 | import java.io.File; | |
4 | import java.io.IOException; | |
5 | ||
6 | import be.nikiroo.gofetch.support.BasicSupport.Type; | |
7 | ||
8 | /** | |
9 | * This class is tha main entry point of the program. It will parse the | |
10 | * arguments, checks them (and warn-and-exit if they are invalid) then call | |
11 | * {@link Fetcher#start()}. | |
12 | * | |
13 | * @author niki | |
14 | */ | |
15 | public class Main { | |
16 | /** | |
17 | * Main entry point. | |
18 | * | |
19 | * @param args | |
20 | * save-to-dir selector-subdir type max hostname port | |
21 | * | |
22 | * @throws IOException | |
23 | * in case of I/O error | |
24 | */ | |
25 | public static void main(String[] args) throws IOException { | |
26 | if (args.length < 6) { | |
27 | System.err | |
28 | .println("Syntax error: gofecth [target dir] [selector] [type or 'ALL'] [max stories] [hostname] [port]"); | |
29 | System.exit(1); | |
30 | } | |
31 | ||
32 | String dirStr = args[0]; | |
33 | String preselectorStr = args[1]; | |
34 | String typeStr = args[2]; | |
35 | String maxStoriesStr = args[3]; | |
36 | String hostnameStr = args[4]; | |
37 | String portStr = args[5]; | |
38 | ||
39 | // Dir | |
40 | File dir = new File(dirStr); | |
41 | dir.mkdirs(); | |
42 | ||
43 | if (!dir.exists()) { | |
44 | System.err.println("Cannot open/create the root directory: " | |
45 | + dirStr); | |
46 | System.exit(1); | |
47 | } | |
48 | ||
49 | if (dir.isFile()) { | |
50 | System.err | |
51 | .println("Root directory exists and is a file: " + dirStr); | |
52 | System.exit(1); | |
53 | } | |
54 | ||
55 | // Selector base (empty is ok, DO NOT end with /) | |
56 | String preselector = ""; | |
57 | if (preselectorStr != null && !preselectorStr.startsWith("/")) { | |
58 | preselector = "/" + preselectorStr; | |
59 | } | |
60 | while (preselector.endsWith("/")) { | |
61 | preselector = preselector.substring(0, preselector.length() - 1); | |
62 | } | |
63 | ||
64 | // Type to download | |
65 | Type type = null; | |
66 | if (!"ALL".equals(typeStr)) { | |
67 | try { | |
68 | Type.valueOf(typeStr.toUpperCase()); | |
69 | } catch (IllegalArgumentException e) { | |
70 | System.err.println("Invalid type: " + typeStr); | |
71 | System.exit(1); | |
72 | } | |
73 | } | |
74 | ||
75 | // Max number of stories to display in the cache | |
76 | int maxStories = 0; | |
77 | try { | |
78 | maxStories = Integer.parseInt(maxStoriesStr); | |
79 | } catch (NumberFormatException e) { | |
80 | System.err | |
81 | .println("The maximum number of stories cannot be parsed: " | |
82 | + maxStoriesStr); | |
83 | System.exit(1); | |
84 | } | |
85 | ||
86 | // | |
87 | String hostname = hostnameStr; | |
88 | ||
89 | // | |
90 | int port = 0; | |
91 | try { | |
92 | port = Integer.parseInt(portStr); | |
93 | } catch (NumberFormatException e) { | |
94 | System.err.println("The port cannot be parsed: " + portStr); | |
95 | System.exit(1); | |
96 | } | |
97 | ||
98 | if (port < 0 || port > 65535) { | |
99 | System.err.println("Invalid port number: " + portStr); | |
100 | System.exit(1); | |
101 | } | |
102 | ||
103 | new Fetcher(dir, preselector, type, maxStories, hostname, port).start(); | |
104 | } | |
105 | } |