我在节点/快速环境中的另一个API中使用Clarifai的Predict API，如下面的代码所示。
如果 Clarifai 的 API 返回成功的响应，我可以重新创建在我的 API 中接收的数据并在 Postman 中查看它。
但是，如果出现错误，Postman 不会显示任何内容，它只是一直在等待响应。
我将其隔离为以下原因： res.json 设法以 JSON 格式返回成功响应，但由于某种原因，它在处理错误响应时挂起/不返回输出。
不清楚原因。
res.send 也不适用于错误响应。我唯一能做的就是安慰.log它。
const callClarifaiApi = (req, res) => {
app.models
.predict(Clarifai.FACE_DETECT_MODEL, req.body.input)
.then(data => {
console.log("Response:", data);
res.json(data);
})
.catch((err) => {
console.log("Error:", err);
res.status(400).json(err);
})
};
这是控制台记录的成功响应
{ status:
{ code: 10000,
description: 'Ok',
req_id: 'b51531471ae2404e810f2efd06a57027' },
outputs:
[ { id: 'a83241abd8ec4117b6c747775e46fa5c',
status: [Object],
created_at: '2019-08-07T12:24:03.174628276Z',
model: [Object],
input: [Object],
data: [Object] } ],
rawData:
{ status:
{ code: 10000,
description: 'Ok',
req_id: 'b51531471ae2404e810f2efd06a57027' },
outputs: [ [Object] ] } }
这是控制台记录的错误响应
{ status: 400,
statusText: 'Bad Request',
headers:
{ 'access-control-allow-headers':
'Content-Type,Accept,X-Requested-With,Content-Type,Accept-Encoding,X-CSRF-Token,Authorization,X-Clarifai-Application-Id,X-Clarifai-REST-API-Key,X-Clarifai-Session-Token,X-Clarifai-Client,X-Clarifai-Site,X-RapidAPI-User,x-clarifai-request-id-prefix',
'access-control-allow-methods': 'GET,HEAD,POST,PUT,PATCH,OPTIONS,DELETE',
'access-control-allow-origin': '*',
'content-type': 'application/json; charset=UTF-8',
date: 'Wed, 07 Aug 2019 12:39:32 GMT',
server: 'nginx',
'content-length': '98',
connection: 'Close' },
config:
{ transformRequest: { '0': [Function: transformRequest] },
transformResponse: { '0': [Function: transformResponse] },
headers:
{ Accept: 'application/json, text/plain, */*',
'Content-Type': 'application/json;charset=utf-8',
Authorization: 'Key XXXXXXXXXXXXXXX',
'X-Clarifai-Client': 'js:2.9.0',
'User-Agent': 'axios/0.11.1',
'Content-Length': 46 },
timeout: 0,
xsrfCookieName: 'XSRF-TOKEN',
xsrfHeaderName: 'X-XSRF-TOKEN',
maxContentLength: -1,
validateStatus: [Function: validateStatus],
method: 'post',
url:
'https://api.clarifai.com/v2/models/a403429f2ddf4b49b307e318f00e528b/outputs',
data: '{"inputs":[{"data":{"image":{"base64":"a"}}}]}',
withCredentials: undefined },
request:
ClientRequest {
_events:
[Object: null prototype] {
error: [Function: handleRequestError],
prefinish: [Function: requestOnPrefinish] },
_eventsCount: 2,
_maxListeners: undefined,
output: [],
outputEncodings: [],
outputCallbacks: [],
outputSize: 0,
writable: true,
_last: true,
chunkedEncoding: false,
shouldKeepAlive: false,
useChunkedEncodingByDefault: true,
sendDate: false,
_removedConnection: false,
_removedContLen: false,
_removedTE: false,
_contentLength: 46,
_hasBody: true,
_trailer: '',
finished: true,
_headerSent: true,
socket:
TLSSocket {
_tlsOptions: [Object],
_secureEstablished: true,
_securePending: false,
_newSessionPending: false,
_controlReleased: true,
_SNICallback: null,
servername: 'api.clarifai.com',
alpnProtocol: false,
authorized: true,
authorizationError: null,
encrypted: true,
_events: [Object],
_eventsCount: 8,
connecting: false,
_hadError: false,
_handle: [TLSWrap],
_parent: null,
_host: 'api.clarifai.com',
_readableState: [ReadableState],
readable: true,
_maxListeners: undefined,
_writableState: [WritableState],
writable: false,
allowHalfOpen: false,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: undefined,
_server: null,
ssl: [TLSWrap],
_requestCert: true,
_rejectUnauthorized: true,
parser: null,
_httpMessage: [Circular],
[Symbol(res)]: [TLSWrap],
[Symbol(asyncId)]: 129,
[Symbol(lastWriteQueueSize)]: 0,
[Symbol(timeout)]: null,
[Symbol(kBytesRead)]: 0,
[Symbol(kBytesWritten)]: 0,
[Symbol(connect-options)]: [Object] },
connection:
TLSSocket {
_tlsOptions: [Object],
_secureEstablished: true,
_securePending: false,
_newSessionPending: false,
_controlReleased: true,
_SNICallback: null,
servername: 'api.clarifai.com',
alpnProtocol: false,
authorized: true,
authorizationError: null,
encrypted: true,
_events: [Object],
_eventsCount: 8,
connecting: false,
_hadError: false,
_handle: [TLSWrap],
_parent: null,
_host: 'api.clarifai.com',
_readableState: [ReadableState],
readable: true,
_maxListeners: undefined,
_writableState: [WritableState],
writable: false,
allowHalfOpen: false,
_sockname: null,
_pendingData: null,
_pendingEncoding: '',
server: undefined,
_server: null,
ssl: [TLSWrap],
_requestCert: true,
_rejectUnauthorized: true,
parser: null,
_httpMessage: [Circular],
[Symbol(res)]: [TLSWrap],
[Symbol(asyncId)]: 129,
[Symbol(lastWriteQueueSize)]: 0,
[Symbol(timeout)]: null,
[Symbol(kBytesRead)]: 0,
[Symbol(kBytesWritten)]: 0,
[Symbol(connect-options)]: [Object] },
_header:
'POST /v2/models/a403429f2ddf4b49b307e318f00e528b/outputs HTTP/1.1rnAccept: application/json, text/plain, */*rnContent-Type: application/json;charset=utf-8rnAuthorization: Key xxxxxxxxxxxxxxxxxxxxxxxxrnX-Clarifai-Client: js:2.9.0rnUser-Agent: axios/0.11.1rnContent-Length: 46rnHost: api.clarifai.comrnConnection: closernrn',
_onPendingData: [Function: noopPendingOutput],
agent:
Agent {
_events: [Object],
_eventsCount: 1,
_maxListeners: undefined,
defaultPort: 443,
protocol: 'https:',
options: [Object],
requests: {},
sockets: [Object],
freeSockets: {},
keepAliveMsecs: 1000,
keepAlive: false,
maxSockets: Infinity,
maxFreeSockets: 256,
maxCachedSessions: 100,
_sessionCache: [Object] },
socketPath: undefined,
timeout: undefined,
method: 'POST',
path: '/v2/models/a403429f2ddf4b49b307e318f00e528b/outputs',
_ended: true,
res:
IncomingMessage {
_readableState: [ReadableState],
readable: false,
_events: [Object],
_eventsCount: 2,
_maxListeners: undefined,
socket: [TLSSocket],
connection: [TLSSocket],
httpVersionMajor: 1,
httpVersionMinor: 1,
httpVersion: '1.1',
complete: true,
headers: [Object],
rawHeaders: [Array],
trailers: {},
rawTrailers: [],
aborted: false,
upgrade: false,
url: '',
method: null,
statusCode: 400,
statusMessage: 'Bad Request',
client: [TLSSocket],
_consuming: false,
_dumped: false,
req: [Circular],
fetchedUrls: [Array] },
aborted: undefined,
timeoutCb: null,
upgradeOrConnect: false,
parser: null,
maxHeadersCount: null,
[Symbol(isCorked)]: false,
[Symbol(outHeadersKey)]:
[Object: null prototype] {
accept: [Array],
'content-type': [Array],
authorization: [Array],
'x-clarifai-client': [Array],
'user-agent': [Array],
'content-length': [Array],
host: [Array] } },
data:
{ status:
{ code: 11102,
description: 'Invalid request',
details: 'Malformed or invalid request' } } }
Express 无法序列化错误对象。 尝试像这样发送：
res.status(400).json({error:err.statusText});