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fix(api-rest): refactor ajax method to not relying on side effects #11498

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merged 7 commits into from
Jul 20, 2023
Merged

fix(api-rest): refactor ajax method to not relying on side effects #11498

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709c4a5
fix(core): make Signer.sign side-effect-ful
AllanZhengYP Jun 14, 2023
91d263f
Revert "fix(core): make Signer.sign side-effect-ful"
AllanZhengYP Jun 14, 2023
a14ac21
fix(api-rest): refactor ajax method to not relying on side effects
AllanZhengYP Jun 14, 2023
0302220
Merge branch 'main' into fix-graphql-skew
AllanZhengYP Jun 14, 2023
cb62a75
Merge branch 'main' into fix-graphql-skew
AllanZhengYP Jun 14, 2023
ea0094d
Merge branch 'main' into fix-graphql-skew
AllanZhengYP Jun 29, 2023
2d94b84
Merge branch 'main' into fix-graphql-skew
AllanZhengYP Jul 20, 2023
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79 changes: 29 additions & 50 deletions packages/api-rest/__tests__/RestAPI-test.ts
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Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,8 @@ import { Signer, Credentials, DateUtils } from '@aws-amplify/core';

jest.mock('axios');

const mockAxios = jest.spyOn(axios as any, 'default');

axios.CancelToken = <CancelTokenStatic>{
source: () => ({ token: null, cancel: null }),
};
Expand All @@ -28,6 +30,7 @@ const config = {

afterEach(() => {
jest.restoreAllMocks();
mockAxios.mockClear();
});

describe('Rest API test', () => {
Expand Down Expand Up @@ -166,19 +169,11 @@ describe('Rest API test', () => {
api.configure(custom_config);
const spyon = jest
.spyOn(Credentials, 'get')
.mockImplementationOnce(() => {
return new Promise((res, rej) => {
res('cred');
});
});
.mockResolvedValueOnce('cred');

const spyonRequest = jest
.spyOn(RestClient.prototype as any, '_request')
.mockImplementationOnce(() => {
return new Promise((res, rej) => {
res({});
});
});
.mockResolvedValueOnce({});
await api.get('apiName', 'path', {});

expect(spyonRequest).toBeCalledWith(
Expand Down Expand Up @@ -221,25 +216,15 @@ describe('Rest API test', () => {
session_token: 'token',
};

const spyon = jest.spyOn(Credentials, 'get').mockImplementation(() => {
return new Promise((res, rej) => {
res(creds);
});
});
const spyon = jest.spyOn(Credentials, 'get').mockResolvedValue(creds);

const spyonSigner = jest
.spyOn(Signer, 'sign')
.mockImplementationOnce(() => {
return { headers: {} };
});

const spyAxios = jest
.spyOn(axios as any, 'default')
.mockImplementationOnce(() => {
return new Promise((res, rej) => {
res(resp);
});
});
mockAxios.mockResolvedValue(resp);

const init = {
timeout: 2500,
Expand Down Expand Up @@ -297,13 +282,7 @@ describe('Rest API test', () => {
return { headers: {} };
});

const spyAxios = jest
.spyOn(axios as any, 'default')
.mockImplementationOnce(() => {
return new Promise((res, rej) => {
res(resp);
});
});
mockAxios.mockResolvedValue(resp);

const init = {
queryStringParameters: {
Expand Down Expand Up @@ -363,13 +342,7 @@ describe('Rest API test', () => {
return { headers: {} };
});

const spyAxios = jest
.spyOn(axios as any, 'default')
.mockImplementationOnce(() => {
return new Promise((res, rej) => {
res(resp);
});
});
mockAxios.mockResolvedValue(resp);

const init = {
queryStringParameters: {
Expand Down Expand Up @@ -429,13 +402,7 @@ describe('Rest API test', () => {
return { headers: {} };
});

const spyAxios = jest
.spyOn(axios as any, 'default')
.mockImplementationOnce(() => {
return new Promise((res, rej) => {
res(resp);
});
});
mockAxios.mockResolvedValue(resp);

const init = {
queryStringParameters: {
Expand Down Expand Up @@ -557,19 +524,31 @@ describe('Rest API test', () => {
.mockImplementation(() => 'endpoint');

jest.spyOn(Credentials, 'get').mockResolvedValue('creds');

jest
.spyOn(RestClient.prototype as any, '_signed')
.mockRejectedValueOnce(normalError);
jest.spyOn(RestClient.prototype as any, '_sign').mockReturnValue({
...init,
headers: { ...init.headers, Authorization: 'signed' },
Dismissed Show dismissed Hide dismissed
});
mockAxios.mockImplementationOnce(() => {
return new Promise((_, rej) => {
rej(normalError);
});
});

await expect(api.post('url', 'path', init)).rejects.toThrow(normalError);

// Clock should not be skewed from normal errors
expect(DateUtils.getClockOffset()).toBe(0);

jest
.spyOn(RestClient.prototype as any, '_signed')
.mockRejectedValueOnce(clockSkewError);
// mock clock skew error response and successful response after retry
mockAxios
.mockImplementationOnce(() => {
return new Promise((_, rej) => {
rej(clockSkewError);
});
})
.mockResolvedValue({
data: [{ name: 'Bob' }],
});

await expect(api.post('url', 'path', init)).resolves.toEqual([
{ name: 'Bob' },
Expand Down
76 changes: 37 additions & 39 deletions packages/api-rest/src/RestClient.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -171,39 +171,42 @@ export class RestClient {
return this._request(params, isAllResponse);
}

// Signing the request in case there credentials are available
return this.Credentials.get().then(
credentials => {
return this._signed({ ...params }, credentials, isAllResponse, {
region,
service,
}).catch(error => {
if (DateUtils.isClockSkewError(error)) {
const { headers } = error.response;
const dateHeader = headers && (headers.date || headers.Date);
const responseDate = new Date(dateHeader);
const requestDate = DateUtils.getDateFromHeaderString(
params.headers['x-amz-date']
);

// Compare local clock to the server clock
if (DateUtils.isClockSkewed(responseDate)) {
DateUtils.setClockOffset(
responseDate.getTime() - requestDate.getTime()
);

return this.ajax(urlOrApiInfo, method, init);
}
}

throw error;
});
},
err => {
logger.debug('No credentials available, the request will be unsigned');
return this._request(params, isAllResponse);
let credentials;
try {
credentials = await this.Credentials.get();
} catch (error) {
logger.debug('No credentials available, the request will be unsigned');
return this._request(params, isAllResponse);
}
let signedParams;
try {
signedParams = this._sign({ ...params }, credentials, {
region,
service,
});
const response = await axios(signedParams);
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Why we need to call axios here and not this.ajax?

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@elorzafe It's from the original implementation. My understanding it this prevents repeated call to this.Credentials.get() and reduce the duplicated debug messages caused by starting from beginning(this.ajax)

return isAllResponse ? response : response.data;
} catch (error) {
logger.debug(error);
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Can we add a little bit of context to this log message?

if (DateUtils.isClockSkewError(error)) {
const { headers } = error.response;
const dateHeader = headers && (headers.date || headers.Date);
const responseDate = new Date(dateHeader);
const requestDate = DateUtils.getDateFromHeaderString(
signedParams.headers['x-amz-date']
);

// Compare local clock to the server clock
if (DateUtils.isClockSkewed(responseDate)) {
DateUtils.setClockOffset(
responseDate.getTime() - requestDate.getTime()
);

return this.ajax(urlOrApiInfo, method, init);
}
}
);
throw error;
}
}

/**
Expand Down Expand Up @@ -356,7 +359,7 @@ export class RestClient {

/** private methods **/

private _signed(params, credentials, isAllResponse, { service, region }) {
private _sign(params, credentials, { service, region }) {
const { signerServiceInfo: signerServiceInfoParams, ...otherParams } =
params;

Expand Down Expand Up @@ -391,12 +394,7 @@ export class RestClient {

delete signed_params.headers['host'];

return axios(signed_params)
.then(response => (isAllResponse ? response : response.data))
.catch(error => {
logger.debug(error);
throw error;
});
return signed_params;
}

private _request(params, isAllResponse = false) {
Expand Down