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Retry API requests automatically after 5xx errors

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This commit is contained in:
Dan Stillman 2015-11-12 02:40:01 -05:00
parent bad9833896
commit 6d289797bf
2 changed files with 44 additions and 14 deletions
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3
chrome/content/zotero/xpcom/http.js
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@ -36,6 +36,9 @@ Zotero.HTTP = new function() {
this.UnexpectedStatusException.prototype.is4xx = function () {
return this.status >= 400 && this.status < 500;
}
this.UnexpectedStatusException.prototype.is5xx = function () {
return this.status >= 500 && this.status < 600;
}
this.UnexpectedStatusException.prototype.toString = function() {
return this.message;
};

55
chrome/content/zotero/xpcom/sync/syncAPIClient.js
View file

@ -37,6 +37,8 @@ Zotero.Sync.APIClient = function (options) {
this.apiVersion = options.apiVersion;
this.apiKey = options.apiKey;
this.caller = options.caller;
this.failureDelayIntervals = [2500, 5000, 10000, 20000, 40000, 60000, 120000, 240000, 300000];
}
Zotero.Sync.APIClient.prototype = {
@ -437,25 +439,50 @@ Zotero.Sync.APIClient.prototype = {
},
makeRequest: function (method, uri, options = {}) {
makeRequest: Zotero.Promise.coroutine(function* (method, uri, options = {}) {
options.headers = this.getHeaders(options.headers);
options.dontCache = true;
options.foreground = !options.background;
options.responseType = options.responseType || 'text';
return this.caller.start(Zotero.Promise.coroutine(function* () {
try {
var xmlhttp = yield Zotero.HTTP.request(method, uri, options);
this._checkBackoff(xmlhttp);
return xmlhttp;
var tries = 0;
var failureDelayGenerator = null;
while (true) {
var result = yield this.caller.start(Zotero.Promise.coroutine(function* () {
try {
var xmlhttp = yield Zotero.HTTP.request(method, uri, options);
this._checkBackoff(xmlhttp);
return xmlhttp;
}
catch (e) {
tries++;
if (e instanceof Zotero.HTTP.UnexpectedStatusException) {
//this._checkRetry(e.xmlhttp);
if (e.is5xx()) {
Zotero.logError(e);
if (!failureDelayGenerator) {
// Keep trying for up to an hour
failureDelayGenerator = Zotero.Utilities.Internal.delayGenerator(
this.failureDelayIntervals, 60 * 60 * 1000
);
}
let keepGoing = yield failureDelayGenerator.next();
if (!keepGoing) {
Zotero.logError("Failed too many times");
throw lastError;
}
return false;
}
}
throw e;
}
}.bind(this)));
if (result) {
return result;
}
catch (e) {
/*if (e instanceof Zotero.HTTP.UnexpectedStatusException) {
this._checkRetry(e.xmlhttp);
}*/
throw e;
}
}.bind(this)));
},
}
}),
_parseJSON: function (json) {