@aws-lambda-powertools/parser
Version:
The parser package for the Powertools for AWS Lambda (TypeScript) library.
90 lines (89 loc) • 3.44 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.CloudWatchEnvelope = void 0;
const zod_1 = require("zod");
const errors_js_1 = require("../errors.js");
const index_js_1 = require("../schemas/index.js");
const envelope_js_1 = require("./envelope.js");
/**
* CloudWatch Envelope to extract messages from the `awslogs.data.logEvents` key.
*/
exports.CloudWatchEnvelope = {
/**
* This is a discriminator to differentiate whether an envelope returns an array or an object
* @hidden
*/
[envelope_js_1.envelopeDiscriminator]: 'array',
parse(data, schema) {
const parsedEnvelope = index_js_1.CloudWatchLogsSchema.parse(data);
return parsedEnvelope.awslogs.data.logEvents.map((record, index) => {
try {
return schema.parse(record.message);
}
catch (error) {
throw new errors_js_1.ParseError(`Failed to parse CloudWatch log event at index ${index}`, {
cause: new zod_1.ZodError(error.issues.map((issue) => ({
...issue,
path: [
'awslogs',
'data',
'logEvents',
index,
'message',
...issue.path,
],
}))),
});
}
});
},
safeParse(data, schema) {
const parsedEnvelope = index_js_1.CloudWatchLogsSchema.safeParse(data);
if (!parsedEnvelope.success) {
return {
success: false,
error: new errors_js_1.ParseError('Failed to parse CloudWatch Log envelope', {
cause: parsedEnvelope.error,
}),
originalEvent: data,
};
}
const result = parsedEnvelope.data.awslogs.data.logEvents.reduce((acc, record, index) => {
const result = schema.safeParse(record.message);
if (!result.success) {
const issues = result.error.issues.map((issue) => ({
...issue,
path: [
'awslogs',
'data',
'logEvents',
index,
'message',
...issue.path,
],
}));
acc.success = false;
acc.errors[index] = { issues };
return acc;
}
acc.messages.push(result.data);
return acc;
}, {
success: true,
messages: [],
errors: {},
});
if (result.success) {
return { success: true, data: result.messages };
}
const errorMessage = Object.keys(result.errors).length > 1
? `Failed to parse CloudWatch Log messages at indexes ${Object.keys(result.errors).join(', ')}`
: `Failed to parse CloudWatch Log message at index ${Object.keys(result.errors)[0]}`;
const errorCause = new zod_1.ZodError(Object.values(result.errors).flatMap((error) => error.issues));
return {
success: false,
error: new errors_js_1.ParseError(errorMessage, { cause: errorCause }),
originalEvent: data,
};
},
};