UnityWebRequest_unitywebrequest unityaction

前言

UnityWebRequest是新的网络请求Api，分为LLApi和HLApi，其中LLApi为低级api，所谓低级api是指只是提供最基本的api接口，然后需要通过不同的参数来确定请求方式。为此unity提供了高级api（HLApi）即对不同的功能进行了封装，以下基于HLApi做了简单封装。

1.简单封装代码

using System.Collections;
using System;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Networking;
using System.Collections.Generic;
using System.IO;

public class WebRequestUtility : MonoBehaviour
{
    public static WebRequestUtility Instance;

    enum RequestType
    {
        TEXT_GET,
        TEXTUREE_GET,
        ASSETBUNDEL,
        POST
    }

    public void Get(string url,Action<UnityWebRequest> action)
    {
        StartCoroutine(Request(url,action,RequestType.TEXT_GET));
    }

    public void GetTexture(string url,Action<UnityWebRequest> action)
    {
        StartCoroutine(Request(url, action, RequestType.TEXTUREE_GET));
    }

    public void GetAssetBundle(string url,Action<UnityWebRequest> action)
    {
        StartCoroutine(Request(url, action, RequestType.ASSETBUNDEL));
    }

    public void Post(string url, Action<UnityWebRequest> action, List<IMultipartFormSection> formData)
    {
        StartCoroutine(Request(url, action, RequestType.POST, formData));
    }

    IEnumerator Request(string url,Action<UnityWebRequest> action,RequestType type, List<IMultipartFormSection> formData=null)
    {
        UnityWebRequest webRequest = null;

        switch (type)
        {
            case RequestType.TEXT_GET:
                webRequest = UnityWebRequest.Get(url);
                break;
            case RequestType.TEXTUREE_GET:
                webRequest = UnityWebRequestTexture.GetTexture(url);
                break;
            case RequestType.ASSETBUNDEL:
                webRequest = UnityWebRequestAssetBundle.GetAssetBundle(url);
                break;
            case RequestType.POST:
                webRequest = UnityWebRequest.Post(url, formData); 
                break;
            default:
                break;
        }

        if(webRequest==null)
        {
            Debug.Log("WebRequest initialise error");
            yield break;
        }

        yield return webRequest.SendWebRequest();

        action?.Invoke(webRequest);

        webRequest.Dispose();
        webRequest = null;
        Resources.UnloadUnusedAssets();
    }

    
    private void Awake()
    {
        Instance = this;        
    }
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83

1.1 Get方法调用

调用方法Get(texUrlGet, OnGetAction);

//OnGetAction回调

    void OnGetAction(UnityWebRequest webRequest)
    {
        if(webRequest.isHttpError || webRequest.isNetworkError)
        {
            Debug.Log("WebRequest error:"+webRequest.error);
            return;
        }

        //下载文本
        Debug.Log(webRequest.downloadHandler.text);

        //下载图片
        Texture2D t2d = new Texture2D(10, 10);
        t2d.LoadImage(webRequest.downloadHandler.data);

        rawImage.texture = t2d;
    }
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

1.2 调用Get方法只获取图片

GetTexture(texUrlGet, OnGetTextueAction);

    void OnGetTextueAction(UnityWebRequest webRequest)
    {
        if (webRequest.isHttpError || webRequest.isNetworkError)
        {
            Debug.Log("WebRequest error:" + webRequest.error);
            return;
        }

        DownloadHandlerTexture texHandler = (DownloadHandlerTexture)webRequest.downloadHandler;
        rawImage.texture = ((DownloadHandlerTexture)webRequest.downloadHandler).texture;
    }
1
2
3
4
5
6
7
8
9
10
11

1.3 post方法

调用方法：

        string headPath = @"D:\zzh.png";
        byte[] bytes = File.ReadAllBytes(headPath);

        List<IMultipartFormSection> formData = new List<IMultipartFormSection>();
        formData.Add(new MultipartFormDataSection("api_key", "**********************"));
        formData.Add(new MultipartFormDataSection("api_secret", "***************************"));
        //formData.Add(new MultipartFormDataSection("image_url", texUrlGet));
        formData.Add(new MultipartFormFileSection("image_file", bytes, "zzh.png", "application/octet-stream"));

        Post("https://api-cn.faceplusplus.com/facepp/v3/detect", OnPostAction, formData);
1
2
3
4
5
6
7
8
9
10

formData仍旧可以使用WWWForm类进行post数据添加

回调函数：

    void OnPostAction(UnityWebRequest webRequest)
    {
        if (webRequest.isHttpError || webRequest.isNetworkError)
        {
            Debug.Log("WebRequest error:" + webRequest.error);
            return;
        }

        //下载文本
        Debug.Log(webRequest.downloadHandler.text);
    
1
2
3
4
5
6
7
8
9
10
11

2.调整版

在post请求时根据需求分为四种模式,详细见https://www.cnblogs.com/llstart-new0201/p/6825058.html；所以此次更新增加了post模式，但新加的并未进行测试

using System.Collections;
using System;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Networking;
using System.Collections.Generic;
using System.IO;

public class WebRequestUtility : MonoBehaviour
{
    public RawImage rawImage;


    public static WebRequestUtility Instance;

    enum RequestType
    {
        TEXT_GET,
        TEXTUREE_GET,
        ASSETBUNDEL,
        POST_FORM,
        POST_URLENCODED,
        POST_JSON,
        POST_XML
    }

    class PostContent
    {
        public WWWForm formData;
        public string stringContent;

        public PostContent(WWWForm formData)
        {
            this.formData = formData;
        }

        public PostContent(string text)
        {
            this.stringContent = text;
        }
    }

    public void Get(string url,Action<UnityWebRequest> action)
    {
        StartCoroutine(Request(url,action,RequestType.TEXT_GET));
    }

    public void GetTexture(string url,Action<UnityWebRequest> action)
    {
        StartCoroutine(Request(url, action, RequestType.TEXTUREE_GET));
    }

    public void GetAssetBundle(string url,Action<UnityWebRequest> action)
    {
        StartCoroutine(Request(url, action, RequestType.ASSETBUNDEL));
    }

    public void Post(string url, Action<UnityWebRequest> action, WWWForm formData)
    {
        StartCoroutine(Request(url, action, RequestType.POST_FORM, new PostContent(formData)));
    }

    public void PostUrlEncoded(string url,Action<UnityWebRequest> action,string json)
    {
        StartCoroutine(Request(url, action, RequestType.POST_URLENCODED,new PostContent(json)));
    }

    public void PostJson(string url, Action<UnityWebRequest> action, string json)
    {
        StartCoroutine(Request(url, action, RequestType.POST_JSON, new PostContent(json)));
    }

    public void PostXml(string url, Action<UnityWebRequest> action, string json)
    {
        StartCoroutine(Request(url, action, RequestType.POST_XML, new PostContent(json)));
    }

    IEnumerator Request(string url,Action<UnityWebRequest> action,RequestType type, PostContent postContent =null)
    {
        UnityWebRequest webRequest = null;

        switch (type)
        {
            case RequestType.TEXT_GET:
                webRequest = UnityWebRequest.Get(url);
                break;
            case RequestType.TEXTUREE_GET:
                webRequest = UnityWebRequestTexture.GetTexture(url);
                break;
            case RequestType.ASSETBUNDEL:
                webRequest = UnityWebRequestAssetBundle.GetAssetBundle(url);
                break;
            case RequestType.POST_FORM:
                webRequest = UnityWebRequest.Post(url, postContent.formData); 
                break;
            case RequestType.POST_URLENCODED:
                webRequest = UnityWebRequest.Post(url, postContent.stringContent);
                //可以不进行设置，此时默认为urlencoded
                webRequest.SetRequestHeader("Content-Type", "application/x-www-form-urlencoded");
                break;
            case RequestType.POST_JSON:
                webRequest = UnityWebRequest.Post(url, postContent.stringContent);
                webRequest.SetRequestHeader("Content-Type", "application/json");
                break;
            case RequestType.POST_XML:
                webRequest = UnityWebRequest.Post(url, postContent.stringContent);
                webRequest.SetRequestHeader("Content-Type", "text/xml");//注:text/plain为纯文本
                break;
            default:
                break;
        }

        if(webRequest==null)
        {
            Debug.Log("WebRequest initialise error");
            yield break;
        }

        yield return webRequest.SendWebRequest();

        action?.Invoke(webRequest);

        action = null;
        webRequest.Dispose();
        webRequest = null;
        Resources.UnloadUnusedAssets();
    }

    private void Awake()
    {
        Instance = this;
    }
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133

3.Post小问题

鉴于post请求可能存在的问题，如https://www.jianshu.com/p/0f1f24829db3所述，做如下代码，

//通过PUT方式构造HTTP请求
byte[] myData = System.Text.Encoding.UTF8.GetBytes("This is some test data");
UnityWebRequest www = UnityWebRequest.Put("http://www.my-server.com/upload", myData);

//构造好后，手动将请求方式更改为POST

 www.method = UnityWebRequest.kHttpVerbPOST;

//常规的发送，接收操作

    yield return www.Send();
    if(www.isError) {
      Debug.Log(www.error);
    }
    else {
      Debug.Log("Upload complete!");
    }
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17

4.UnityWebRequest LLAPI

public IEnumerator PostUrl(string url, string postData)
    {
        using (UnityWebRequest www = new UnityWebRequest(url,"POST"))
        {
            byte[] postBytes = System.Text.Encoding.UTF8.GetBytes(postData);
            www.uploadHandler = (UploadHandler)new UploadHandlerRaw(postBytes);
            www.downloadHandler = (DownloadHandler)new DownloadHandlerBuffer();
            www.SetRequestHeader("Content-Type", "application/json");
            yield return www.Send();
            if (www.isError)
            {
                Debug.Log(www.error);
            }
            else
            {
                // Show results as text  
                if (www.responseCode == 200)
                {
                    Debug.Log(www.downloadHandler.text);
                }
            }
        }
    }
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23