Java Google云存储API和可恢复上传返回空位置头

我试图使用Google云存储JSON API获取可恢复上传的位置头，如下所述：，但我总是收到响应代码400的错误请求。我知道我在这条路上的某个地方犯了一个愚蠢的错误，但我就是看不到这是在哪里发生的，所以如果有人能成功地让这个工作，或者能指出我所缺少的东西，那将是一个很大的帮助

这是我的申请代码：

private static final String RESUMEABLE_UPLOAD_URL_FORMAT = "https://www.googleapis.com/upload/storage/v1/b/%s/o?uploadType=resumable"

public String getLocationForResumeableUpload(String filename, ResourceType resourceType, String contentType, Long contentLength) throws EndpointException {
    String resumeableUploadURL = String.format(RESUMEABLE_UPLOAD_URL_FORMAT,
            getBucketForResourceType(resourceType).getBucketName());

    try {
        URL uploadURL = new URL(resumeableUploadURL);
        HttpURLConnection connection = (HttpURLConnection) uploadURL.openConnection();

        connection.setRequestMethod("POST");
        connection.setRequestProperty("X-Upload-Content-Type", contentType);
        connection.setRequestProperty("X-Upload-Content-Length", "" + contentLength);
        connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");

        String json = "{\"name\":\"" + filename + "\"}";
        connection.setRequestProperty("Content-Length", String.valueOf(json.getBytes().length));

        List<String> scopes = new ArrayList<>();
        scopes.add("https://www.googleapis.com/auth/devstorage.full_control");
        AppIdentityService.GetAccessTokenResult accessToken =
                AppIdentityServiceFactory.getAppIdentityService().getAccessToken(scopes);
        connection.setRequestProperty("Authorization", "Bearer " + accessToken.getAccessToken());
        connection.connect();

        if (connection.getResponseCode() >= 400) {
            log.debug("connection failed with accessToken: " + accessToken.getAccessToken());
            log.debug(connection.getResponseMessage());
            throw new NotFoundException("Object at url: " + resumeableUploadURL +
                    " returns response code: " + connection.getResponseCode() + " response message: " + connection.getResponseMessage());
        }

        String responseMessage = connection.getResponseMessage();
        String locationHeader = connection.getHeaderField("Location");
        log.debug("Upload request response: " + responseMessage + " Location header: " + locationHeader);
        return locationHeader;

    } catch (MalformedURLException e) {
        log.error("URL Malformed: " + resumeableUploadURL + " unable to fetch resumeable upload url", e);
        throw new InternalServerException("Unable to complete upload request", e);
    } catch (IOException e) {
        log.error("Unable to fetch upload URL from GCS: " + resumeableUploadURL, e);
        throw new InternalServerException("Unable to complete upload request", e);
    }
}

private static final String RESUMEABLE\u UPLOAD\u URL\u FORMAT=”https://www.googleapis.com/upload/storage/v1/b/%s/o?uploadType=resumable"
公共字符串GetLocationForResumableUpload（字符串文件名、ResourceType ResourceType、String contentType、Long contentLength）引发EndpointException异常{
String resumeableUploadURL=String.format（可恢复上传URL格式，
getBucketForResourceType（resourceType）.getBucketName（））；
试一试{
URL uploadURL=新URL（resumeableUploadURL）；
HttpURLConnection connection=（HttpURLConnection）uploadURL.openConnection（）；
connection.setRequestMethod（“POST”）；
connection.setRequestProperty（“X-Upload-Content-Type”，contentType）；
connection.setRequestProperty（“X-Upload-Content-Length”，“”+contentLength）；
setRequestProperty（“内容类型”，“应用程序/json；字符集=UTF-8”）；
字符串json=“{\'name\”：\”“+filename+“\”}”；
setRequestProperty（“Content-Length”，String.valueOf（json.getBytes（）.Length））；
列表范围=新的ArrayList（）；
作用域。添加（“https://www.googleapis.com/auth/devstorage.full_control");
AppIdentityService.GetAccessTokenResult accessToken=
AppIdentityServiceFactory.getAppIdentityService（）.getAccessToken（作用域）；
setRequestProperty（“授权”、“承载者”+accessToken.getAccessToken（））；
connection.connect（）；
if（connection.getResponseCode（）>=400）{
调试（“与accessToken的连接失败：+accessToken.getAccessToken（））；
log.debug（connection.getResponseMessage（））；
抛出新的NotFoundException（“url处的对象：”+ResumableUploadURL+
返回响应代码：“+connection.getResponseCode（）+”响应消息：“+connection.getResponseMessage（））；
}
字符串responseMessage=connection.getResponseMessage（）；
字符串locationHeader=connection.getHeaderField（“位置”）；
log.debug（“上传请求响应：+responseMessage+”位置头：+locationHeader”）；
返回位置标题；
}捕获（格式错误）{
log.error（“URL格式错误：+ResumableUploadURL+“无法获取可恢复上传URL”，e）；
抛出新的InternalServerException（“无法完成上传请求”，e）；
}捕获（IOE异常）{
log.error（“无法从GCS获取上传URL:+ResumableUploadURL，e”）；
抛出新的InternalServerException（“无法完成上传请求”，e）；
}
}

---

更新1:结果发现我的代码中有一个bug，我正在检查响应代码>400，请求返回响应代码：400-错误请求。现在我的问题是，为什么我的请求不正确？

因此，需要将对象的名称放入查询字符串中，如下所示：

private static final String RESUMEABLE_UPLOAD_URL_FORMAT = "https://www.googleapis.com/upload/storage/v1/b/%s/o?uploadType=resumable&name=%s"

public String getLocationForResumeableUpload(String filename, ResourceType resourceType, String contentType, Long contentLength) throws EndpointException {
    String resumeableUploadURL = String.format(RESUMEABLE_UPLOAD_URL_FORMAT,
            getBucketForResourceType(resourceType).getBucketName(), filename);

    try {
        URL uploadURL = new URL(resumeableUploadURL);
        HttpURLConnection connection = (HttpURLConnection) uploadURL.openConnection();

        connection.setRequestMethod("POST");
        connection.setRequestProperty("X-Upload-Content-Type", contentType);
        connection.setRequestProperty("X-Upload-Content-Length", "" + contentLength);
        connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
        connection.setRequestProperty("Content-Length", String.valueOf(0));

        List<String> scopes = new ArrayList<>();
        scopes.add("https://www.googleapis.com/auth/devstorage.full_control");
        AppIdentityService.GetAccessTokenResult accessToken =
                AppIdentityServiceFactory.getAppIdentityService().getAccessToken(scopes);
        connection.setRequestProperty("Authorization", "Bearer " + accessToken.getAccessToken());
        connection.connect();

        if (connection.getResponseCode() >= 400) {
            log.debug("connection failed with accessToken: " + accessToken.getAccessToken());
            log.debug(connection.getResponseMessage());
            throw new NotFoundException("Object at url: " + resumeableUploadURL +
                    " returns response code: " + connection.getResponseCode() + " response message: " + connection.getResponseMessage());
        }

        String responseMessage = connection.getResponseMessage();
        String locationHeader = connection.getHeaderField("Location");
        log.debug("Upload request response " + connection.getResponseCode() + " : " + responseMessage + " Location header: " + locationHeader);
        return locationHeader;

    } catch (MalformedURLException e) {
        log.error("URL Malformed: " + resumeableUploadURL + " unable to fetch resumeable upload url", e);
        throw new InternalServerException("Unable to complete upload request", e);
    } catch (IOException e) {
        log.error("Unable to fetch upload URL from GCS: " + resumeableUploadURL, e);
        throw new InternalServerException("Unable to complete upload request", e);
    }
}

因此，完整的代码如下所示：

private static final String RESUMEABLE_UPLOAD_URL_FORMAT = "https://www.googleapis.com/upload/storage/v1/b/%s/o?uploadType=resumable&name=%s"

public String getLocationForResumeableUpload(String filename, ResourceType resourceType, String contentType, Long contentLength) throws EndpointException {
    String resumeableUploadURL = String.format(RESUMEABLE_UPLOAD_URL_FORMAT,
            getBucketForResourceType(resourceType).getBucketName(), filename);

    try {
        URL uploadURL = new URL(resumeableUploadURL);
        HttpURLConnection connection = (HttpURLConnection) uploadURL.openConnection();

        connection.setRequestMethod("POST");
        connection.setRequestProperty("X-Upload-Content-Type", contentType);
        connection.setRequestProperty("X-Upload-Content-Length", "" + contentLength);
        connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
        connection.setRequestProperty("Content-Length", String.valueOf(0));

        List<String> scopes = new ArrayList<>();
        scopes.add("https://www.googleapis.com/auth/devstorage.full_control");
        AppIdentityService.GetAccessTokenResult accessToken =
                AppIdentityServiceFactory.getAppIdentityService().getAccessToken(scopes);
        connection.setRequestProperty("Authorization", "Bearer " + accessToken.getAccessToken());
        connection.connect();

        if (connection.getResponseCode() >= 400) {
            log.debug("connection failed with accessToken: " + accessToken.getAccessToken());
            log.debug(connection.getResponseMessage());
            throw new NotFoundException("Object at url: " + resumeableUploadURL +
                    " returns response code: " + connection.getResponseCode() + " response message: " + connection.getResponseMessage());
        }

        String responseMessage = connection.getResponseMessage();
        String locationHeader = connection.getHeaderField("Location");
        log.debug("Upload request response " + connection.getResponseCode() + " : " + responseMessage + " Location header: " + locationHeader);
        return locationHeader;

    } catch (MalformedURLException e) {
        log.error("URL Malformed: " + resumeableUploadURL + " unable to fetch resumeable upload url", e);
        throw new InternalServerException("Unable to complete upload request", e);
    } catch (IOException e) {
        log.error("Unable to fetch upload URL from GCS: " + resumeableUploadURL, e);
        throw new InternalServerException("Unable to complete upload request", e);
    }
}

公共字符串GetLocationForResumableUpload（字符串文件名、ResourceType ResourceType、String contentType、Long contentLength）引发EndpointException{
String resumeableUploadURL=String.format（可恢复上传URL格式，
getBucketForResourceType（resourceType）.getBucketName（），文件名）；
试一试{
URL uploadURL=新URL（resumeableUploadURL）；
HttpURLConnection connection=（HttpURLConnection）uploadURL.openConnection（）；
connection.setRequestMethod（“POST”）；
connection.setRequestProperty（“X-Upload-Content-Type”，contentType）；
connection.setRequestProperty（“X-Upload-Content-Length”，“”+contentLength）；
setRequestProperty（“内容类型”，“应用程序/json；字符集=UTF-8”）；
connection.setRequestProperty（“内容长度”，String.valueOf（0））；
列表范围=新的ArrayList（）；
作用域。添加（“https://www.googleapis.com/auth/devstorage.full_control");
AppIdentityService.GetAccessTokenResult accessToken=
AppIdentityServiceFactory.getAppIdentityService（）.getAccessToken（作用域）；
setRequestProperty（“授权”、“承载者”+accessToken.getAccessToken（））；
connection.connect（）；
if（connection.getResponseCode（）>=400）{
调试（“与accessToken的连接失败：+accessToken.getAccessToken（））；
log.debug（connection.getResponseMessage（））；
抛出新的NotFoundException（“url处的对象：”+ResumableUploadURL+
返回响应代码：“+connection.getResponseCode（）+”响应消息：“+connection.getResponseMessage（））；
}
字符串responseMessage=connection.getResponseMessage（）；
字符串locationHeader=connection.getHeaderField（“位置”）；
log.debug（“上传请求-响应”+连接.getResponseCode（）+”：“+responseMessage+”位置头：“%+locationHeader”）；
返回位置标题；
}捕获（格式错误）{
log.error（“URL格式错误：+ResumableUploadURL+“无法获取可恢复上传URL”，e）；
抛出新的InternalServerException（“无法完成上传请求”，e）；
}捕获（IOE异常）{
log.error（“无法从GCS获取上传URL:+ResumableUploadURL，e”）；
抛出新的InternalServerException（“无法完成上传请求”，e）；
}
}