URL Encoding : URI « Network « C# / C Sharp






  1. C# / C Sharp
  2. Network
  3. URI

URL Encoding

       
using System;
using System.Collections;

public static class HTTPUtility
{
    #region URL Encoding

    public static string UrlEncode(string s)
    {
        if (s == null)
            return null;

        string result = string.Empty;

        for (int i = 0; i < s.Length; i++)
        {
            if (ShouldEncodeChar(s[i]))
                result += '%' + ByteToHex((byte)s[i]);
            else
                result += s[i];
        }

        return result;
    }

    private static bool ShouldEncodeChar(char c)
    {
        // Safe characters defined by RFC3986:
        // http://oauth.net/core/1.0/#encoding_parameters

        if (c >= '0' && c <= '9')
            return false;
        if (c >= 'A' && c <= 'Z')
            return false;
        if (c >= 'a' && c <= 'z')
            return false;
        switch (c)
        {
            case '-':
            case '.':
            case '_':
            case '~':
                return false;
        }

        // All other characters should be encoded
        return true;
    }

    public static string ByteToHex(byte b)
    {
        const string hex = "0123456789ABCDEF";
        int lowNibble = b & 0x0F;
        int highNibble = (b & 0xF0) >> 4;
        string s = new string(new char[] { hex[highNibble], hex[lowNibble] });
        return s;
    }

    #endregion

}








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1.Use UriUse Uri
2.Build the hash table of HTML entity references and encode Url
3.Is Relative Url
4.Is Rooted Url
5.Correctly encode a name for a URL.
6.Essentially creates a query string.
7.Uri Class Provides an object representation of a uniform resource identifier (URI) and easy access to the parts of the URI.
8.Initializes a new instance of the Uri class with the specified URI.
9.Initializes a new instance of the Uri class based on the specified base URI and relative URI string.
10.Gets the absolute path of the URI.
11.Gets the absolute URI.
12.Gets the Domain Name System (DNS) host name or IP address and the port number for a server.
13.Determines whether the specified host name is a valid DNS name.
14.Determines whether the specified scheme name is valid.
15.Gets an unescaped host name that is safe to use for DNS resolution.
16.Gets the escaped URI fragment.
17.Gets the decimal value of a hexadecimal digit.
18.Gets the hash code for the URI.
19.Gets the specified portion of a Uri instance.
20.Converts a specified character into its hexadecimal equivalent.
21.Gets the host component of this instance.
22.Gets the type of the host name specified in the URI.
23.Gets whether the port value of the URI is the default for this scheme.
24.Gets a value indicating whether the specified Uri is a file URI.
25.Determines whether a specified character is a valid hexadecimal digit.
26.Gets whether the specified Uri references the local host.
27.Gets whether the specified Uri is a universal naming convention (UNC) path.
28.Gets a local operating-system representation of a file name.
29.Determines the difference between two Uri instances.
30.Gets the original URI string that was passed to the Uri constructor.
31.Gets the AbsolutePath and Query properties separated by a question mark (?).
32.Gets the port number of this URI.
33.Gets any query information included in the specified URI.
34.Gets the scheme name for this URI.
35.Gets an array containing the path segments that make up the specified URI.
36.Gets a canonical string representation for the specified Uri instance.
37.Specifies that the URI is a pointer to a file.
38.Specifies that the URI is accessed through the File Transfer Protocol (FTP).
39.Specifies that the URI is accessed through the Gopher protocol.
40.Specifies that the URI is accessed through the Hypertext Transfer Protocol (HTTP).
41.Specifies that the URI is accessed through the Secure Hypertext Transfer Protocol (HTTPS).
42.Specifies that the URI is an e-mail address and is accessed through the Simple Mail Transport Protocol (SMTP).
43.Specifies that the URI is an Internet news group and is accessed through the Network News Transport Protocol (NNTP).
44.Uri.UriSchemeNntp
45.Indicates that the URI string was completely escaped before the Uri instance was created.
46.Gets the user name, password, or other user-specific information associated with the specified URI.
47.Download text data from the specified URI
48.Expand Uri
49.Expand Relative Uri
50.Parse the query string in the URI into a KeyValuePair
51.Assembles a series of key=value pairs as a URI-escaped query-string.
52.Get Absolute Url For Local File
53.Get Post ID From URL
54.Combine URL
55.Url Encode
56.Url encoding (2)
57.Url Encode 2
58.Url Encode 3
59.Retrieves the subdomain from the specified URL.
60.Try to parse the url, similar to int.TryParse
61.Is Link Valid