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我正在嘗試爲Reddit's Api創建擴展名。 Reddit遵循OAuth 2獲取access_token。我正在使用RestTemplate彈簧來發送所有對Reddit的POST請求。根據文檔，我能夠成功完成第一階段。用戶被重定向到Reddit，在那裏他/她允許我的應用程序，Reddit然後通過代碼將我重新導向到我的應用程序。但是，第二階段似乎並不奏效。我必須使用代碼來使另一個職位要求：Spring Social Reddit擴展 - OAuth 2 Access_token檢索。 401錯誤
https://ssl.reddit.com/api/v1/access_token
這裏是我獲得AccessGrant（SpringSocial包裝器的accessToken從reddit的發回）的嘗試。 Spring Social需要你擴展OAuth2Template並從那裏實現認證過程。在典型的Spring應用程序中，控制器將使用助手來調用RedditOAuth2Template.exchangeForAccess並將返回的AccessGrant保存到數據庫中。
根據Reddit API文檔401響應由於缺乏客戶端憑證通過HTTP基本身份驗證發生。但是，我在createHeaders（String username，String password）方法中這樣做。
公共類RedditOAuth2Template擴展OAuth2Template {
private static final Logger LOG = LogManager.getLogger(RedditOAuth2Template.class);
private String client_id;
private String client_secret;
public RedditOAuth2Template(String clientId, String clientSecret) {
super(clientId, clientSecret, RedditPaths.OAUTH_AUTH_URL, RedditPaths.OAUTH_TOKEN_URL);
this.client_id = clientId;
this.client_secret = clientSecret;
setUseParametersForClientAuthentication(true);
}
@Override
@SuppressWarnings({"unchecked", "rawtypes"})
protected AccessGrant postForAccessGrant(String accessTokenUrl, MultiValueMap<String, String> parameters) {
HttpHeaders headers = createHeaders(client_id, client_secret);
headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
headers.set(accessTokenUrl, accessTokenUrl);
HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<MultiValueMap<String, String>>(parameters, headers);
ResponseEntity<Map> responseEntity = getRestTemplate().exchange(accessTokenUrl, HttpMethod.POST, requestEntity, Map.class);
Map<String, Object> responseMap = responseEntity.getBody();
return extractAccessGrant(responseMap);
}
/*
Reddit requires client_id and client_secret be
placed via HTTP basic Auth when retrieving the access_token
*/
private HttpHeaders createHeaders(String username, String password) {
String auth = username + ":" + password;
byte[] encodedAuth = Base64.getEncoder().encode(auth.getBytes(Charset.forName("US-ASCII")));
HttpHeaders headers = new HttpHeaders();
String authHeader = "Basic " + new String(encodedAuth);
headers.set("Authorization", authHeader);
return headers;
}
private AccessGrant extractAccessGrant(Map<String, Object> result) {
String accessToken = (String) result.get("access_token");
String scope = (String) result.get("scope");
String refreshToken = (String) result.get("refresh_token");
// result.get("expires_in") may be an Integer, so cast it to Number first.
Number expiresInNumber = (Number) result.get("expires_in");
Long expiresIn = (expiresInNumber == null) ? null : expiresInNumber.longValue();
return createAccessGrant(accessToken, scope, refreshToken, expiresIn, result);
}
}