Wiki source code of Setting up API communication by REST services with TerraIndex for customers
Version 1.3 by Robert Jan Daams on 2025/02/04 11:15
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author | version | line-number | content |
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1 | = Usefull code snippets = | ||
2 | |||
3 | == C# .NET == | ||
4 | |||
5 | == Zip Stream class == | ||
6 | |||
7 | {{info}} | ||
8 | This is a Zip Stream class you can use to extract a zipstream. | ||
9 | {{/info}} | ||
10 | |||
11 | {{code language="Csharp" layout="LINENUMBERS"}} | ||
12 | /// <summary> | ||
13 | /// Helper class for compress en decompress of file data | ||
14 | /// </summary> | ||
15 | public static class ZipStreamHelper { | ||
16 | #region Compress and encode | ||
17 | /// <summary> | ||
18 | /// Comprimeer een string en geeft deze terug in Base64 string. | ||
19 | /// </summary> | ||
20 | /// <param name="content">filecontent</param> | ||
21 | /// <returns>gecomprimeerde string</returns> | ||
22 | public static string CompressToBase64String(string content) { | ||
23 | //string to byte[] | ||
24 | byte[] contentArray = stringToByteArray(content); | ||
25 | // Compress | ||
26 | byte[] compressed = Compress(contentArray); | ||
27 | return base64_encode(compressed); | ||
28 | } | ||
29 | |||
30 | /// <summary> | ||
31 | /// Zet een string om naar een ByteArray | ||
32 | /// </summary> | ||
33 | /// <param name="content">filecontent</param> | ||
34 | /// <returns>ByteArray</returns> | ||
35 | public static byte[] stringToByteArray(string content) { | ||
36 | System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding(); | ||
37 | return encoding.GetBytes(content); | ||
38 | } | ||
39 | |||
40 | /// <summary> | ||
41 | /// comprimeer een ByteArray | ||
42 | /// </summary> | ||
43 | /// <param name="data">filedata als ByteArray</param> | ||
44 | /// <returns>gecomprimeerde ByteArray</returns> | ||
45 | public static byte[] Compress(byte[] data) { | ||
46 | using(var compressedStream = new MemoryStream()) | ||
47 | using(var zipStream = new GZipStream(compressedStream, CompressionMode.Compress)) { | ||
48 | zipStream.Write(data, 0, data.Length); | ||
49 | zipStream.Close(); | ||
50 | return compressedStream.ToArray(); | ||
51 | } | ||
52 | } | ||
53 | |||
54 | /// <summary> | ||
55 | /// Zet een ByteArray om naar een Base64 string | ||
56 | /// </summary> | ||
57 | /// <param name="data">gecomprimeerde ByteArray</param> | ||
58 | /// <returns>Base 64 string</returns> | ||
59 | public static string base64_encode(byte[] data) { | ||
60 | if (data == null) | ||
61 | return string.Empty; | ||
62 | return Convert.ToBase64String(data); | ||
63 | } | ||
64 | |||
65 | /// <summary> | ||
66 | /// Zet een string om naar een Base64 string | ||
67 | /// </summary> | ||
68 | /// <param name="data">string</param> | ||
69 | /// <returns>Base 64 string</returns> | ||
70 | public static string string_base64_encode(string data) { | ||
71 | if (string.IsNullOrEmpty(data)) | ||
72 | return string.Empty; | ||
73 | |||
74 | //string to byte[] | ||
75 | byte[] contentArray = stringToByteArray(data); | ||
76 | return base64_encode(contentArray); | ||
77 | } | ||
78 | #endregion | ||
79 | |||
80 | #region Decompress and decode | ||
81 | // Decode and decompress | ||
82 | /// <summary> | ||
83 | /// Decomprimeer een Base64 string naar een string | ||
84 | /// </summary> | ||
85 | /// <param name="contentBase64">GZIP Base64 string</param> | ||
86 | /// <returns>string</returns> | ||
87 | public static string DecompressBase64StringToString(string contentBase64) { | ||
88 | // Decompress | ||
89 | byte[] decoded = base64_decode(contentBase64); | ||
90 | byte[] decompressed = Decompress(decoded); | ||
91 | |||
92 | return byteArrayTostring(decompressed); | ||
93 | } | ||
94 | |||
95 | /// <summary> | ||
96 | /// Zet een ByteArray om in een normale string | ||
97 | /// </summary> | ||
98 | /// <param name="data">ByteArray</param> | ||
99 | /// <returns>string</returns> | ||
100 | public static string byteArrayTostring(byte[] data) { | ||
101 | System.Text.UTF8Encoding enc = new System.Text.UTF8Encoding(); | ||
102 | return enc.GetString(data); | ||
103 | } | ||
104 | |||
105 | /// <summary> | ||
106 | /// Zet een Base64 string om naar een ByteArray | ||
107 | /// </summary> | ||
108 | /// <param name="encodedData">Base64 string</param> | ||
109 | /// <returns>gecomprimeerde ByteArray</returns> | ||
110 | public static byte[] base64_decode(string encodedData) { | ||
111 | byte[] encodedDataAsBytes = Convert.FromBase64String(encodedData); | ||
112 | return encodedDataAsBytes; | ||
113 | } | ||
114 | |||
115 | /// <summary> | ||
116 | /// Zet een gecomprimeerde ByteArray om in een ByteArray | ||
117 | /// </summary> | ||
118 | /// <param name="data">gecomprimeerde ByteArray</param> | ||
119 | /// <returns>ByteArray (gedecomprimeerd)</returns> | ||
120 | public static byte[] Decompress(byte[] data) { | ||
121 | using(var compressedStream = new MemoryStream(data)) | ||
122 | using(var zipStream = new GZipStream(compressedStream, CompressionMode.Decompress)) | ||
123 | using(var resultStream = new MemoryStream()) { | ||
124 | var buffer = new byte[4096]; | ||
125 | int read; | ||
126 | |||
127 | while ((read = zipStream.Read(buffer, 0, buffer.Length)) > 0) { | ||
128 | resultStream.Write(buffer, 0, read); | ||
129 | } | ||
130 | |||
131 | return resultStream.ToArray(); | ||
132 | } | ||
133 | } | ||
134 | #endregion | ||
135 | } | ||
136 | {{/code}} |