如何在 android 上使用 Graph API 将文件上传到 Sharepoint 站点的文档库

Question

我正在开发一个 android 应用程序 (Java Android)，它需要将 excel 文件上传到 Sharepoint 站点的库，开始我使用了这个示例使用图表 API : https://github.com/microsoftgraph/android-java-connect-sample 此示例将图片上传到用户的 One Drive 存储库。

所以，多亏了 graph explorer，我更改了查询，这样图片就进入了我网站的库并且它可以工作，但是当我从我的 android 应用程序执行查询时，我得到了这个错误：403 error

我的代码：

public void uploadPictureToOneDrive(byte[] picture, ICallback<DriveItem> callback) {

    try {
        String id = new String("groupeeiffage.sharepoint.com,1f99a971-b596-4c9b-ba31-784d70c05f49,88ea0abd-a92d-412c-b047-86744a64c0ea");
        mGraphServiceClient
                .getSites(id)
                .getDrive()
                .getRoot()
                .getItemWithPath("me.png")
                .getContent()
                .buildRequest()
                .put(picture, callback);
    } catch (Exception ex) {
        showException(ex, "exception on upload picture to OneDrive ","Upload picture failed", "The upload picture  method failed");
    }
}

我知道这是授权问题，但我在 Microsoft 文档中迷路了。我如何允许我的应用程序使用 Graph API 将文件上传到共享点？

如果有人已经做过类似的事情，我真的很想得到一些帮助。

Answer 1

作为解决方法，我们可以使用 SharePoint REST API 在 Android 中上传文件。

从 Microsoft 身份验证门户获取安全令牌：

public String receiveSecurityToken() throws TransformerException, URISyntaxException {

    RequestEntity<String> requestEntity = 
        new RequestEntity<>(buildSecurityTokenRequestEnvelope(), 
        HttpMethod.POST, 
        new URI("https://login.microsoftonline.com/extSTS.srf"));

    ResponseEntity<String> responseEntity = restTemplate.exchange(requestEntity, String.class);
    DOMResult result = new DOMResult();

    Transformer transformer = TransformerFactory.newInstance().newTransformer();
    transformer.transform(new StringSource(responseEntity.getBody()), result);

    Document definitionDocument = (Document) result.getNode();
    String securityToken = xPathExpression.evaluateAsString(definitionDocument);

    if (StringUtils.isBlank(securityToken)) { 
        throw new SharePointAuthenticationException("Unable to authenticate: empty token");
    }

    return securityToken;
}

发送到门户的信封格式如下：

<s:Envelope 
    xmlns:s="http://www.w3.org/2003/05/soap-envelope" 
    xmlns:a="http://www.w3.org/2005/08/addressing">
    <s:Header>
        <a:Action s:mustUnderstand="1">http://schemas.xmlsoap.org/ws/2005/02/trust/RST/Issue</a:Action>
        <a:ReplyTo>
            <a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>
        </a:ReplyTo>
        <a:To s:mustUnderstand="1">https://login.microsoftonline.com/extSTS.srf</a:To>
        <o:Security s:mustUnderstand="1" 
            xmlns:o="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
            <o:UsernameToken>
                <o:Username>[username]</o:Username>
                <o:Password>[password]</o:Password>
            </o:UsernameToken>
        </o:Security>
    </s:Header>
    <s:Body>
        <t:RequestSecurityToken 
            xmlns:t="http://schemas.xmlsoap.org/ws/2005/02/trust">
            <wsp:AppliesTo 
                xmlns:wsp="http://schemas.xmlsoap.org/ws/2004/09/policy">
                <a:EndpointReference>
                    <a:Address>[SharePoint domain address]</a:Address>
                </a:EndpointReference>
            </wsp:AppliesTo>
            <t:KeyType>http://schemas.xmlsoap.org/ws/2005/05/identity/NoProofKey</t:KeyType>
            <t:RequestType>http://schemas.xmlsoap.org/ws/2005/02/trust/Issue</t:RequestType>
            <t:TokenType>urn:oasis:names:tc:SAML:1.0:assertion</t:TokenType>
        </t:RequestSecurityToken>
    </s:Body>
</s:Envelope>

从 SharePoint Online 服务器获取 cookie：

public List<String> getSignInCookies(String securityToken) throws TransformerException, URISyntaxException {

    RequestEntity<String> requestEntity = 
        new RequestEntity<>(securityToken, 
            HttpMethod.POST, 
            new URI("[SharePoint domain address]/_forms/default.aspx?wa=wsignin1.0"));

    ResponseEntity<String> responseEntity = restTemplate.exchange(requestEntity, String.class);
    HttpHeaders headers = responseEntity.getHeaders();
    List<String> cookies = headers.get("Set-Cookie");

    if (CollectionUtils.isEmpty(cookies)) {
        throw new SharePointSignInException("Unable to sign in: no cookies returned in response");
    } 

    return cookies;
}

获取 SharePoint Online 服务器请求的签名 (FormDigestValue)：

public String getFormDigestValue(List<String> cookies) throws IOException, URISyntaxException, 
    TransformerException, JSONException {

    MultiValueMap<String, String> headers = new LinkedMultiValueMap<>();
    headers.add("Cookie", Joiner.on(';').join(cookies));
    headers.add("Accept", "application/json;odata=verbose");
    headers.add("X-ClientService-ClientTag", "SDK-JAVA");

    RequestEntity<String> requestEntity = new RequestEntity<>(headers, 
        HttpMethod.POST, new URI("[SharePoint domain address]/_api/contextinfo"));

    ResponseEntity<String> responseEntity = restTemplate.exchange(requestEntity, String.class);
    JSONObject json = new JSONObject(responseEntity.getBody());

    return json.getJSONObject("d")
        .getJSONObject("GetContextWebInformation").getString("FormDigestValue"); 
}

最后，我们可以调用 REST API 来上传文件，如下所示。

url: http://site url/_api/web/GetFolderByServerRelativeUrl('/Folder Name')/Files/add(url='a.txt',overwrite=true)
method: POST
body: "Contents of file"
Headers: Authorization: "Bearer " + accessToken
         X-RequestDigest: form digest value
         content-length:length of post body

public String performHttpRequest(String path, String json, boolean isUpdate) throws Exception {

    String securityToken = receiveSecurityToken();
    List<String> cookies = getSignInCookies(securityToken);
    String formDigestValue = getFormDigestValue(cookies);

    MultiValueMap<String, String> headers = new LinkedMultiValueMap<>();
    headers.add("Cookie", Joiner.on(';').join(cookies));
    headers.add("Content-type", "application/json;odata=verbose");
    headers.add("X-RequestDigest", formDigestValue);                     

    RequestEntity<String> requestEntity = new RequestEntity<>(json, 
        headers, HttpMethod.POST, new URI(path));

    ResponseEntity<String> responseEntity = 
        restTemplate.exchange(requestEntity, String.class);

    return responseEntity.getBody();
}

更多信息供您参考：

如何在 android 上使用 Graph API 将文件上传到 Sharepoint 站点的文档库

How to upload files to sharepoint site's document library using Graph API on android

android

sharepoint-online

microsoft-graph-api