我正在尝试从AWS lambda调用外部API。我没有使用node.js http模块，因为听说它很麻烦。因此，我正在尝试使用AWS开发工具包SDK来完成任务。参见https://boylesoftware.com/blog/calling-restful-apis-from-inline-aws-lambda-functions/。这段代码似乎大部分都可以工作，但是我不确定，因为API应该返回XML有效负载，但事实并非如此。没有引发任何错误，但在{}变量中返回了空对象data。
我猜这与我注释掉的输出规范有关。我对SDK的了解不深，无法知道如何描述XML有效负载。我尝试将其切换为字符串无济于事。
当我通过Postman调用它时，我能够从该API成功接收XML有效负载。我的Lambda代码下面包含来自API的示例响应。
'use strict';
// load AWS SDK module, which is always included in the runtime environment
const AWS = require('aws-sdk');
const UTA = {
token: process.env.uta_api_token
};
// define our target API as a "service"
const svc = new AWS.Service({
// the API base URL
endpoint: 'http://api.rideuta.com/SIRI/SIRI.svc',
// don't parse API responses
// (this is optional if you want to define shapes of all your endpoint responses)
convertResponseTypes: false,
// and now, our API endpoints
apiConfig: {
metadata: {
protocol: 'rest-xml' // API returns XML
},
operations: {
// GetStop stuff
GetStop: {
http: {
method: 'GET',
// note the placeholder in the URI
requestUri: 'StopMonitor'
},
input: {
type: 'structure',
required: [ 'auth', 'stopid', 'minutesout' ],
members: {
'auth': {
// send authentication header in the HTTP request header
location: 'uri',
locationName: 'usertoken',
sensitive: true
},
'stopid': {
// all kinds of validators are available
type: 'string',
// include it in the call URI
location: 'uri',
// this is the name of the placeholder in the URI
locationName: 'stopid'
},
'minutesout' : {
type : 'integer',
location : 'uri',
locationName : 'minutesout'
}
}
},
/*
output: {
type: 'structure',
members: {
'ResponseTimestamp' : {
location : 'body',
locationName : 'ResponseTimestamp'
}
}
}
*/
}
}
}
});
// disable AWS region related login in the SDK
svc.isGlobalEndpoint = true;
// and now we can call our target API!
exports.handler = function(event, context, callback) {
// note how the methods on our service are defined after the operations
//ontext.succeed('hello world');
svc.getStop({
auth: UTA.token,
stopid: 'FR301084',
minutesout : 600,
}, (err, data) => {
if (err) {
console.error('>>> operation error:', err);
return callback(err);
}
console.log('it worked');
console.log(UTA.token);
console.log(data);
callback();
});
};
<?xml version="1.0" encoding="utf-8"?>
<Siri version="1.3" xmlns="http://www.siri.org.uk/siri">
<ResponseTimestamp>2019-02-16T22:37:24.1431014-07:00</ResponseTimestamp>
<StopMonitoringDelivery version="1.3">
<ResponseTimestamp>2019-02-16T22:37:24.1431014-07:00</ResponseTimestamp>
<ValidUntil>2019-02-16T22:37:34.1431014-07:00</ValidUntil>
<MonitoredStopVisit>
<RecordedAtTime>2019-02-16T22:37:24.1431014-07:00</RecordedAtTime>
<MonitoredVehicleJourney>
<LineRef>750</LineRef>
<DirectionRef>SOUTHBOUND</DirectionRef>
<FramedVehicleJourneyRef>
<DataFrameRef>2019-02-16T00:00:00-07:00</DataFrameRef>
<DatedVehicleJourneyRef>3706978</DatedVehicleJourneyRef>
</FramedVehicleJourneyRef>
<PublishedLineName>FRONTRUNNER</PublishedLineName>
<OriginRef>FR601084</OriginRef>
<DestinationRef>FR801164</DestinationRef>
<Monitored>True</Monitored>
<VehicleLocation>
<Longitude>-111.9306</Longitude>
<Latitude>41.004124</Latitude>
</VehicleLocation>
<ProgressRate>1</ProgressRate>
<CourseOfJourneyRef>18084</CourseOfJourneyRef>
<VehicleRef>113</VehicleRef>
<MonitoredCall>
<StopPointRef>FR301084</StopPointRef>
<VisitNumber>1</VisitNumber>
<VehicleAtStop>false</VehicleAtStop>
<Extensions>
<EstimatedDepartureTime>136</EstimatedDepartureTime>
<Direction>To Provo</Direction>
<Distance>9644.7823876475977</Distance>
</Extensions>
</MonitoredCall>
<Extensions>
<LastGPSFix>2019-02-16T22:37:16</LastGPSFix>
<Scheduled>False</Scheduled>
<Bearing>129.54093468554098</Bearing>
<Speed>79.829126894854753</Speed>
<DestinationName>Provo</DestinationName>
</Extensions>
</MonitoredVehicleJourney>
<MonitoredVehicleJourney>
<LineRef>750</LineRef>
<DirectionRef>NORTHBOUND</DirectionRef>
<FramedVehicleJourneyRef>
<DataFrameRef>2019-02-16T00:00:00-07:00</DataFrameRef>
<DatedVehicleJourneyRef>3706927</DatedVehicleJourneyRef>
</FramedVehicleJourneyRef>
<PublishedLineName>FRONTRUNNER</PublishedLineName>
<OriginRef>FR801164</OriginRef>
<DestinationRef>FR601084</DestinationRef>
<Monitored>True</Monitored>
<VehicleLocation>
<Longitude>-111.904274</Longitude>
<Latitude>40.625053</Latitude>
</VehicleLocation>
<ProgressRate>1</ProgressRate>
<CourseOfJourneyRef>18124</CourseOfJourneyRef>
<VehicleRef>108</VehicleRef>
<MonitoredCall>
<StopPointRef>FR301081</StopPointRef>
<VisitNumber>1</VisitNumber>
<VehicleAtStop>false</VehicleAtStop>
<Extensions>
<EstimatedDepartureTime>2912</EstimatedDepartureTime>
<Direction>To Ogden</Direction>
<Distance>132285.03109158284</Distance>
</Extensions>
</MonitoredCall>
<Extensions>
<LastGPSFix>2019-02-16T22:37:20</LastGPSFix>
<Scheduled>False</Scheduled>
<Bearing>10.410927719684226</Bearing>
<Speed>79.067224214902424</Speed>
<DestinationName>Ogden</DestinationName>
</Extensions>
</MonitoredVehicleJourney>
</MonitoredStopVisit>
<Extensions>
<StopName>FARMINGTON STATION</StopName>
<StopLongitude>-111.903667000</StopLongitude>
<StopLatitude>40.987266000</StopLatitude>
<StopLocation>Utah</StopLocation>
</Extensions>
</StopMonitoringDelivery>
</Siri>
答案 0 :(得分：0)
convertResponseTypes需要设置为true。