C# Google Drive API上载HTTP多部分Unity3d

我有这种代码

List<IMultipartFormSection> formData = new List<IMultipartFormSection>();
formData.Add(new MultipartFormDataSection("metadata","{ \"name\":" + salvataggio2.Substring(0, salvataggio2.Length - 5) + "-to-google-drive.json" + ", \"parents\":['" + entries.Files[0].Id + "'] }","application/json"));
formData.Add(new MultipartFormDataSection("file", Application.persistentDataPath + "/Saves/" + salvataggio2, "application/json"));
//formData.Add(new MultipartFormFileSection(salvataggio2.Substring(0, salvataggio2.Length - 5) + "-to-google-drive.json", Application.persistentDataPath + "/Saves/" + salvataggio2));
//string jsonMetadata = "--foo_bar_baz" + System.Environment.NewLine + " Content-Type: application/json; charset=UTF-8 { \"name\":" + salvataggio2.Substring(0, salvataggio2.Length - 5) + "-to-google-drive.json" + ", \"parents\":['" + entries.Files[0].Id + "'] }" + System.Environment.NewLine + "--foo_bar_baz" + System.Environment.NewLine + "Content-Type: application/json; charset=UTF-8" + File.ReadAllText(Application.persistentDataPath + "/Saves/" + salvataggio2) + System.Environment.NewLine + "--foo_bar_baz--" + System.Environment.NewLine;
//byte[] bytes = Encoding.UTF8.GetBytes(jsonMetadata);
using (UnityWebRequest www = UnityWebRequest.Post("https://www.googleapis.com/upload/drive/v3/files?uploadType=multipart", formData)) {
//var upload = new UploadHandlerRaw(bytes);
//www.uploadHandler = upload;
www.SetRequestHeader("Authorization", "Bearer " + response.Access_token);
//www.SetRequestHeader("Content-Type", "multipart/related; boundary=foo_bar_baz");

yield return www.SendWebRequest();
if (www.result == UnityWebRequest.Result.ConnectionError || www.result == UnityWebRequest.Result.ProtocolError) {
    Debug.Log(www.downloadHandler.text);
    this.gameObject.SetActive(false);
} else {
    Debug.Log(www.downloadHandler.text);
}
}

我并不真的不明白我需要改变什么，因为我仍然得到“在多部分体中缺少端点边界”

--foo_bar_baz——应该是结局

我的代码部分现在看起来像这样

string jsonMetadata = "--foo_bar_baz" + System.Environment.NewLine 
            + "Content-Disposition: form-data; name=\"metadata\"" + System.Environment.NewLine 
            + "Content-Type: application/json; charset=UTF-8" + System.Environment.NewLine + System.Environment.NewLine
            + "{ \"name\":\"" + salvataggio2.Substring(0, salvataggio2.Length - 5) + "-to-google-drive.json\"" + ", \"parents\":[\"" + entries.Files[0].Id + "\"] }" + System.Environment.NewLine 
            + "--foo_bar_baz" + System.Environment.NewLine
            + "Content-Disposition: form-data; name=\"file\"" + System.Environment.NewLine
            + "Content-Type: application/json; charset=UTF-8" + System.Environment.NewLine + System.Environment.NewLine
            + File.ReadAllText(Application.persistentDataPath + "/Saves/" + salvataggio2) + System.Environment.NewLine 
            + "--foo_bar_baz--" + System.Environment.NewLine;

---

好的，我终于解决了这个问题（我可以说，我现在不确定它是如何工作的，但我可以肯定地说，我需要用Unity api创建边界）

List formData=new List（）；
formData.Add（新的MultipartFormDataSection（“metadata”、“{\”name\”：\”+salvataggio2.Substring（0，salvataggio2.Length-5）+”-到google drive.json\+”、“\”parents\”：[\”“+entries.Files[0].Id+“\”]，“application/json”）；
添加（新的MultipartFormDataSection（“file”，file.ReadAllText（Application.persistentDataPath+“/Saves/”+salvataggio2），“Application/json”）；
字节[]边界=UnityWebRequest.GenerateBondary（）；
字节[]formSections=UnityWebRequest.SerializeFormSections（formData，边界）；
byte[]terminate=Encoding.UTF8.GetBytes（String.Concat（“\r\n--”），Encoding.UTF8.GetString（boundary），“--”）；
byte[]body=新字节[formSections.Length+terminate.Length]；
块拷贝（formSections，0，body，0，formSections.Length）；
Buffer.BlockCopy（terminate，0，body，formSections.Length，terminate.Length）；
string contentType=string.Concat（“多部分/相关；边界=，Encoding.UTF8.GetString（边界））；
使用（UnityWebRequest www=UnityWebRequest.Post）https://www.googleapis.com/upload/drive/v3/files?uploadType=multipart", "")) {
var upload=新的UploadHandlerRaw（主体）；
www.uploadHandler=upload；
www.SetRequestHeader（“授权”、“承载人”+响应.Access\u令牌）；
www.SetRequestHeader（“内容类型”，contentType）；
返回www.SendWebRequest（）；
if（www.result==UnityWebRequest.result.ConnectionError | | www.result==UnityWebRequest.result.ProtocolError）{
Log（www.downloadHandler.text）；
this.gameObject.SetActive（false）；
}否则{
Log（www.downloadHandler.text）；
}
}

正如您可以看到的，在前2次添加到formData之后（与之前相同），它创建了一个随机边界，它序列化了表单和边界，它创建了一个终止，它融合了所有内容，并创建了一个兼容的内容类型。

---

在那之后，我只创建了通常的Unity Post（在正文中使用UploadHandler作为字节数组），就完成了。

这是否回答了您的问题@DaImTo我已经读过了。我不认为这是与Unity3d formData兼容的问题。事实上，我在Unity网站的“stackoverflow-like”网站上找到了自己的部分答案。我会在1小时内（尽快）接受我自己的答案。请不要结束这个问题，没有必要，它可以帮助很多需要在Unity3d中使用google drive API的人（google没有官方支持，也没有官方框架）。

string jsonMetadata = "--foo_bar_baz" + System.Environment.NewLine 
            + "Content-Disposition: form-data; name=\"metadata\"" + System.Environment.NewLine 
            + "Content-Type: application/json; charset=UTF-8" + System.Environment.NewLine + System.Environment.NewLine
            + "{ \"name\":\"" + salvataggio2.Substring(0, salvataggio2.Length - 5) + "-to-google-drive.json\"" + ", \"parents\":[\"" + entries.Files[0].Id + "\"] }" + System.Environment.NewLine 
            + "--foo_bar_baz" + System.Environment.NewLine
            + "Content-Disposition: form-data; name=\"file\"" + System.Environment.NewLine
            + "Content-Type: application/json; charset=UTF-8" + System.Environment.NewLine + System.Environment.NewLine
            + File.ReadAllText(Application.persistentDataPath + "/Saves/" + salvataggio2) + System.Environment.NewLine 
            + "--foo_bar_baz--" + System.Environment.NewLine;

        List<IMultipartFormSection> formData = new List<IMultipartFormSection>();
        formData.Add(new MultipartFormDataSection("metadata", "{ \"name\":\"" + salvataggio2.Substring(0, salvataggio2.Length - 5) + "-to-google-drive.json\"" + ", \"parents\":[\"" + entries.Files[0].Id + "\"] }", "application/json"));
        formData.Add(new MultipartFormDataSection("file", File.ReadAllText(Application.persistentDataPath + "/Saves/" + salvataggio2), "application/json"));
        byte[] boundary = UnityWebRequest.GenerateBoundary();
        byte[] formSections = UnityWebRequest.SerializeFormSections(formData, boundary);
        byte[] terminate = Encoding.UTF8.GetBytes(String.Concat("\r\n--", Encoding.UTF8.GetString(boundary), "--"));
        byte[] body = new byte[formSections.Length + terminate.Length];
        Buffer.BlockCopy(formSections, 0, body, 0, formSections.Length);
        Buffer.BlockCopy(terminate, 0, body, formSections.Length, terminate.Length);
        string contentType = String.Concat("multipart/related; boundary=", Encoding.UTF8.GetString(boundary));

        using (UnityWebRequest www = UnityWebRequest.Post("https://www.googleapis.com/upload/drive/v3/files?uploadType=multipart", "")) {
            var upload = new UploadHandlerRaw(body);
            www.uploadHandler = upload;
            www.SetRequestHeader("Authorization", "Bearer " + response.Access_token);
            www.SetRequestHeader("Content-Type", contentType);

            yield return www.SendWebRequest();
            if (www.result == UnityWebRequest.Result.ConnectionError || www.result == UnityWebRequest.Result.ProtocolError) {
                Debug.Log(www.downloadHandler.text);
                this.gameObject.SetActive(false);
            } else {
                Debug.Log(www.downloadHandler.text);
            }
        }