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Mini Shell
Mini Shell
'use strict';
Object.defineProperty(exports, "__esModule", { value: true });
const core_1 = require("@opencensus/core");
const shimmer = require("shimmer");
const semver = require("semver");
exports.kMiddlewareStack = Symbol('express-middleware-stack');
class ExpressPlugin extends core_1.BasePlugin {
constructor(moduleName) {
super(moduleName);
this.kPatched = Symbol('express-layer-patched');
}
applyPatch() {
this.logger.debug('Patched express');
if (!semver.satisfies(this.version, '^4.0.0')) {
this.logger.debug('express version %s not supported - aborting...', this.version);
return this.moduleExports;
}
if (this.moduleExports) {
const routerProto = semver.satisfies(this.version, '^5')
? (this.moduleExports.Router && this.moduleExports.Router.prototype)
: this.moduleExports.Router;
const plugin = this;
this.logger.debug('patching express.Router.prototype.route');
shimmer.wrap(routerProto, 'route', (original) => {
return function route_trace(path) {
const route = original.apply(this, arguments);
const layer = this.stack[this.stack.length - 1];
plugin.applyLayerPatch(layer, path);
return route;
};
});
this.logger.debug('patching express.Router.prototype.use');
shimmer.wrap(routerProto, 'use', (original) => {
return function use(path) {
const route = original.apply(this, arguments);
const layer = this.stack[this.stack.length - 1];
plugin.applyLayerPatch(layer, path);
return route;
};
});
this.logger.debug('patching express.Application.use');
shimmer.wrap(this.moduleExports.application, 'use', (original) => {
return function use(path) {
const route = original.apply(this, arguments);
const layer = this._router.stack[this._router.stack.length - 1];
plugin.applyLayerPatch(layer, path);
return route;
};
});
}
return this.moduleExports;
}
applyUnpatch() {
if (!semver.satisfies(this.version, '^4.0.0')) {
return this.moduleExports;
}
const routerProto = semver.satisfies(this.version, '^5')
? (this.moduleExports.Router && this.moduleExports.Router.prototype)
: this.moduleExports.Router;
shimmer.unwrap(routerProto, 'use');
shimmer.unwrap(routerProto, 'route');
shimmer.unwrap(this.moduleExports.application, 'use');
}
applyLayerPatch(layer, layerPath) {
const plugin = this;
if (layer[this.kPatched] === true)
return;
layer[this.kPatched] = true;
plugin.logger.debug('patching express.Router.Layer.handle');
shimmer.wrap(layer, 'handle', function (original) {
if (original.length !== 4) {
return function (req, res, next) {
plugin.safePush(req, exports.kMiddlewareStack, layerPath);
let spanName = `Middleware - ${layer.name}`;
if (layer.route) {
spanName = `Route - ${layer.route.path}`;
}
else if (layer.name === 'router') {
spanName = `Router - ${layerPath}`;
}
const span = plugin.tracer.startChildSpan(spanName, core_1.SpanKind.CLIENT);
if (span === null)
return original.apply(this, arguments);
arguments[2] = function () {
if (!(req.route && arguments[0] instanceof Error)) {
req[exports.kMiddlewareStack].pop();
}
return plugin.patchEnd(span, next)();
};
return original.apply(this, arguments);
};
}
return function (_err, req, res, next) {
return original.apply(this, arguments);
};
});
}
safePush(obj, prop, value) {
if (!obj[prop])
obj[prop] = [];
obj[prop].push(value);
}
patchEnd(span, callback) {
const plugin = this;
const patchedEnd = function (err) {
if (plugin.options.detailedCommands === true && err instanceof Error) {
span.addAttribute('error', err.message);
}
if (span.ended === false) {
span.end();
}
return callback.apply(this, arguments);
};
return this.tracer.wrap(patchedEnd);
}
}
exports.ExpressPlugin = ExpressPlugin;
const plugin = new ExpressPlugin('express');
exports.plugin = plugin;
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
Zerion Mini Shell 1.0