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Adds backoff / retry to HTTP calls. #545

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Merged
merged 4 commits into from
Jan 9, 2018
Merged

Adds backoff / retry to HTTP calls. #545

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cf1da6a
Adds backoff / retry to HTTP calls.
gguuss Jan 5, 2018
3183147
Merge branch 'master' into exponential-backoff
gguuss Jan 5, 2018
d3a9fb8
Switches request library from requestretry to retry-request.
gguuss Jan 5, 2018
be80033
Merge branch 'exponential-backoff' of https://github.com/GoogleCloudP…
gguuss Jan 5, 2018
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27 changes: 22 additions & 5 deletions iot/http_example/cloudiot_http_example.js
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Original file line number Diff line number Diff line change
Expand Up @@ -17,7 +17,7 @@
// [START iot_http_includes]
const fs = require('fs');
const jwt = require('jsonwebtoken');
const request = require('request');
const request = require('retry-request');
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Nit: can we name this something other than request (to avoid confusion with the library of the same name)? Maybe retryRequest?

// [END iot_http_includes]

console.log('Google Cloud IoT Core HTTP example.');
Expand Down Expand Up @@ -141,19 +141,28 @@ function publishAsync (authToken, messageCount, numMessages) {
binary_data: binaryData
}
};

const options = {
url: url,
headers: {
'authorization': `Bearer ${authToken}`,
'content-type': 'application/json',
'cache-control': 'no-cache'
},
body: postData,
json: true,
body: postData
method: 'POST',
retries: 5,
shouldRetryFn:
function (incomingHttpMessage) {
return incomingHttpMessage.statusMessage !== 'OK';
}
};

// Send events for high-frequency updates, update state only occasionally.
const delayMs = argv.messageType === 'events' ? 1000 : 2000;
request.post(options, function (error, response, body) {
console.log(JSON.stringify(request));
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Is this intended?

request(options, function (error, response, body) {
if (error) {
console.error('Received error: ', error);
} else if (response.body.error) {
Expand Down Expand Up @@ -182,6 +191,7 @@ function publishAsync (authToken, messageCount, numMessages) {
// [START iot_http_getconfig]
function getConfig (authToken, version) {
console.log(`Getting config from URL: ${urlBase}`);

const options = {
url: urlBase + '/config?local_version=' + version,
headers: {
Expand All @@ -190,9 +200,16 @@ function getConfig (authToken, version) {
'cache-control': 'no-cache'

},
json: true
json: true,
retries: 5,
shouldRetryFn:
function (incomingHttpMessage) {
console.log('Retry?');
return incomingHttpMessage.statusMessage !== 'OK';
}
};
request.get(options, function (error, response, body) {
console.log(JSON.stringify(request.RetryStrategies));
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Ditto - is this intended?

request(options, function (error, response, body) {
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@ace-n ace-n Jan 5, 2018 •
edited
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Nit: arrow function?

(Apply this comment throughout your PR if you decide to make any changes.)

if (error) {
console.error('Received error: ', error);
} else if (response.body.error) {
Expand Down
6 changes: 3 additions & 3 deletions iot/http_example/package.json
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Expand Up @@ -14,10 +14,10 @@
"@google-cloud/pubsub": "0.13.2",
"@google-cloud/nodejs-repo-tools": "1.4.17",
"ava": "0.22.0",
"yargs": "8.0.2",
"jsonwebtoken": "7.4.1",
"request": "2.82.0",
"uuid": "3.1.0"
"retry-request": "3.3.1",
"uuid": "3.1.0",
"yargs": "8.0.2"
},
"testDependencies": {
},
Expand Down