fix(otlp-http-exporter): update endpoint to match spec (#2895)

Co-authored-by: Daniel Dyla <[email protected]> Co-authored-by: Chengzhong Wu <[email protected]>
open-telemetry · May 17, 2022 · 69cced2 · 69cced2
1 parent a9c59da
commit 69cced2
Show file tree

Hide file tree

Showing 15 changed files with 428 additions and 69 deletions.
diff --git a/experimental/CHANGELOG.md b/experimental/CHANGELOG.md
@@ -20,6 +20,7 @@ All notable changes to experimental packages in this project will be documented
 
 * fix(opentelemetry-instrumentation-http): use correct origin when port is `null` #2948 @danielgblanco
 * fix(otlp-exporter-base): include esm and esnext in package files #2952 @dyladan
+* fix(otlp-http-exporter): update endpoint to match spec #2895 @svetlanabrennan
 
 ### :books: (Refine Doc)
 

diff --git a/experimental/packages/exporter-trace-otlp-http/src/platform/browser/OTLPTraceExporter.ts b/experimental/packages/exporter-trace-otlp-http/src/platform/browser/OTLPTraceExporter.ts
@@ -14,14 +14,18 @@
  * limitations under the License.
  */
 
-import { appendResourcePathToUrlIfNotPresent, OTLPExporterBrowserBase } from '@opentelemetry/otlp-exporter-base';
 import { ReadableSpan, SpanExporter } from '@opentelemetry/sdk-trace-base';
 import { getEnv, baggageUtils } from '@opentelemetry/core';
-import { OTLPExporterConfigBase } from '@opentelemetry/otlp-exporter-base';
+import {
+  OTLPExporterConfigBase,
+  appendResourcePathToUrl,
+  appendRootPathToUrlIfNeeded,
+  OTLPExporterBrowserBase
+} from '@opentelemetry/otlp-exporter-base';
 import { createExportTraceServiceRequest, IExportTraceServiceRequest } from '@opentelemetry/otlp-transformer';
 
-const DEFAULT_COLLECTOR_RESOURCE_PATH = '/v1/traces';
-const DEFAULT_COLLECTOR_URL=`http://localhost:4318${DEFAULT_COLLECTOR_RESOURCE_PATH}`;
+const DEFAULT_COLLECTOR_RESOURCE_PATH = 'v1/traces';
+const DEFAULT_COLLECTOR_URL = `http://localhost:4318/${DEFAULT_COLLECTOR_RESOURCE_PATH}`;
 
 /**
  * Collector Trace Exporter for Web
@@ -49,9 +53,9 @@ export class OTLPTraceExporter
     return typeof config.url === 'string'
       ? config.url
       : getEnv().OTEL_EXPORTER_OTLP_TRACES_ENDPOINT.length > 0
-        ? getEnv().OTEL_EXPORTER_OTLP_TRACES_ENDPOINT
+        ? appendRootPathToUrlIfNeeded(getEnv().OTEL_EXPORTER_OTLP_TRACES_ENDPOINT, DEFAULT_COLLECTOR_RESOURCE_PATH)
         : getEnv().OTEL_EXPORTER_OTLP_ENDPOINT.length > 0
-          ? appendResourcePathToUrlIfNotPresent(getEnv().OTEL_EXPORTER_OTLP_ENDPOINT, DEFAULT_COLLECTOR_RESOURCE_PATH)
+          ? appendResourcePathToUrl(getEnv().OTEL_EXPORTER_OTLP_ENDPOINT, DEFAULT_COLLECTOR_RESOURCE_PATH)
           : DEFAULT_COLLECTOR_URL;
   }
 }
diff --git a/experimental/packages/exporter-trace-otlp-http/src/platform/node/OTLPTraceExporter.ts b/experimental/packages/exporter-trace-otlp-http/src/platform/node/OTLPTraceExporter.ts
@@ -19,12 +19,13 @@ import { getEnv, baggageUtils } from '@opentelemetry/core';
 import { OTLPExporterNodeBase } from '@opentelemetry/otlp-exporter-base';
 import {
   OTLPExporterNodeConfigBase,
-  appendResourcePathToUrlIfNotPresent
+  appendResourcePathToUrl,
+  appendRootPathToUrlIfNeeded
 } from '@opentelemetry/otlp-exporter-base';
 import { createExportTraceServiceRequest, IExportTraceServiceRequest } from '@opentelemetry/otlp-transformer';
 
-const DEFAULT_COLLECTOR_RESOURCE_PATH = '/v1/traces';
-const DEFAULT_COLLECTOR_URL = `http://localhost:4318${DEFAULT_COLLECTOR_RESOURCE_PATH}`;
+const DEFAULT_COLLECTOR_RESOURCE_PATH = 'v1/traces';
+const DEFAULT_COLLECTOR_URL = `http://localhost:4318/${DEFAULT_COLLECTOR_RESOURCE_PATH}`;
 
 /**
  * Collector Trace Exporter for Node
@@ -51,9 +52,9 @@ export class OTLPTraceExporter
     return typeof config.url === 'string'
       ? config.url
       : getEnv().OTEL_EXPORTER_OTLP_TRACES_ENDPOINT.length > 0
-        ? getEnv().OTEL_EXPORTER_OTLP_TRACES_ENDPOINT
+        ? appendRootPathToUrlIfNeeded(getEnv().OTEL_EXPORTER_OTLP_TRACES_ENDPOINT, DEFAULT_COLLECTOR_RESOURCE_PATH)
         : getEnv().OTEL_EXPORTER_OTLP_ENDPOINT.length > 0
-          ? appendResourcePathToUrlIfNotPresent(getEnv().OTEL_EXPORTER_OTLP_ENDPOINT, DEFAULT_COLLECTOR_RESOURCE_PATH)
+          ? appendResourcePathToUrl(getEnv().OTEL_EXPORTER_OTLP_ENDPOINT, DEFAULT_COLLECTOR_RESOURCE_PATH)
           : DEFAULT_COLLECTOR_URL;
   }
 }
diff --git a/experimental/packages/exporter-trace-otlp-http/test/browser/CollectorTraceExporter.test.ts b/experimental/packages/exporter-trace-otlp-http/test/browser/CollectorTraceExporter.test.ts
@@ -508,16 +508,25 @@ describe('OTLPTraceExporter - browser (getDefaultUrl)', () => {
 
 describe('when configuring via environment', () => {
   const envSource = window as any;
-  it('should use url defined in env', () => {
+  it('should use url defined in env that ends with root path and append version and signal path', () => {
+    envSource.OTEL_EXPORTER_OTLP_ENDPOINT = 'http://foo.bar/';
+    const collectorExporter = new OTLPTraceExporter();
+    assert.strictEqual(
+      collectorExporter.url,
+      `${envSource.OTEL_EXPORTER_OTLP_ENDPOINT}v1/traces`
+    );
+    envSource.OTEL_EXPORTER_OTLP_ENDPOINT = '';
+  });
+  it('should use url defined in env without checking if path is already present', () => {
     envSource.OTEL_EXPORTER_OTLP_ENDPOINT = 'http://foo.bar/v1/traces';
     const collectorExporter = new OTLPTraceExporter();
     assert.strictEqual(
       collectorExporter.url,
-      envSource.OTEL_EXPORTER_OTLP_ENDPOINT
+      `${envSource.OTEL_EXPORTER_OTLP_ENDPOINT}/v1/traces`
     );
     envSource.OTEL_EXPORTER_OTLP_ENDPOINT = '';
   });
-  it('should use url defined in env and append version and signal when not present', () => {
+  it('should use url defined in env and append version and signal', () => {
     envSource.OTEL_EXPORTER_OTLP_ENDPOINT = 'http://foo.bar';
     const collectorExporter = new OTLPTraceExporter();
     assert.strictEqual(
@@ -527,8 +536,8 @@ describe('when configuring via environment', () => {
     envSource.OTEL_EXPORTER_OTLP_ENDPOINT = '';
   });
   it('should override global exporter url with signal url defined in env', () => {
-    envSource.OTEL_EXPORTER_OTLP_ENDPOINT = 'http://foo.bar';
-    envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.traces';
+    envSource.OTEL_EXPORTER_OTLP_ENDPOINT = 'http://foo.bar/';
+    envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.traces/';
     const collectorExporter = new OTLPTraceExporter();
     assert.strictEqual(
       collectorExporter.url,
@@ -537,6 +546,42 @@ describe('when configuring via environment', () => {
     envSource.OTEL_EXPORTER_OTLP_ENDPOINT = '';
     envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = '';
   });
+  it('should add root path when signal url defined in env contains no path and no root path', () => {
+    envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.bar';
+    const collectorExporter = new OTLPTraceExporter();
+    assert.strictEqual(
+      collectorExporter.url,
+      `${envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT}/`
+    );
+    envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = '';
+  });
+  it('should not add root path when signal url defined in env contains root path but no path', () => {
+    envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.bar/';
+    const collectorExporter = new OTLPTraceExporter();
+    assert.strictEqual(
+      collectorExporter.url,
+      `${envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT}`
+    );
+    envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = '';
+  });
+  it('should not add root path when signal url defined in env contains path', () => {
+    envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.bar/v1/traces';
+    const collectorExporter = new OTLPTraceExporter();
+    assert.strictEqual(
+      collectorExporter.url,
+      `${envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT}`
+    );
+    envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = '';
+  });
+  it('should not add root path when signal url defined in env contains path and ends in /', () => {
+    envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.bar/v1/traces/';
+    const collectorExporter = new OTLPTraceExporter();
+    assert.strictEqual(
+      collectorExporter.url,
+      `${envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT}`
+    );
+    envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = '';
+  });
   it('should use headers defined via env', () => {
     envSource.OTEL_EXPORTER_OTLP_HEADERS = 'foo=bar';
     const collectorExporter = new OTLPTraceExporter({ headers: {} });

diff --git a/experimental/packages/exporter-trace-otlp-http/test/node/CollectorTraceExporter.test.ts b/experimental/packages/exporter-trace-otlp-http/test/node/CollectorTraceExporter.test.ts
@@ -82,16 +82,25 @@ describe('OTLPTraceExporter - node with json over http', () => {
 
   describe('when configuring via environment', () => {
     const envSource = process.env;
-    it('should use url defined in env', () => {
+    it('should use url defined in env that ends with root path and append version and signal path', () => {
+      envSource.OTEL_EXPORTER_OTLP_ENDPOINT = 'http://foo.bar/';
+      const collectorExporter = new OTLPTraceExporter();
+      assert.strictEqual(
+        collectorExporter.url,
+        `${envSource.OTEL_EXPORTER_OTLP_ENDPOINT}v1/traces`
+      );
+      envSource.OTEL_EXPORTER_OTLP_ENDPOINT = '';
+    });
+    it('should use url defined in env without checking if path is already present', () => {
       envSource.OTEL_EXPORTER_OTLP_ENDPOINT = 'http://foo.bar/v1/traces';
       const collectorExporter = new OTLPTraceExporter();
       assert.strictEqual(
         collectorExporter.url,
-        envSource.OTEL_EXPORTER_OTLP_ENDPOINT
+        `${envSource.OTEL_EXPORTER_OTLP_ENDPOINT}/v1/traces`
       );
       envSource.OTEL_EXPORTER_OTLP_ENDPOINT = '';
     });
-    it('should use url defined in env and append version and signal when not present', () => {
+    it('should use url defined in env and append version and signal', () => {
       envSource.OTEL_EXPORTER_OTLP_ENDPOINT = 'http://foo.bar';
       const collectorExporter = new OTLPTraceExporter();
       assert.strictEqual(
@@ -101,8 +110,8 @@ describe('OTLPTraceExporter - node with json over http', () => {
       envSource.OTEL_EXPORTER_OTLP_ENDPOINT = '';
     });
     it('should override global exporter url with signal url defined in env', () => {
-      envSource.OTEL_EXPORTER_OTLP_ENDPOINT = 'http://foo.bar';
-      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.traces';
+      envSource.OTEL_EXPORTER_OTLP_ENDPOINT = 'http://foo.bar/';
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.traces/';
       const collectorExporter = new OTLPTraceExporter();
       assert.strictEqual(
         collectorExporter.url,
@@ -111,6 +120,42 @@ describe('OTLPTraceExporter - node with json over http', () => {
       envSource.OTEL_EXPORTER_OTLP_ENDPOINT = '';
       envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = '';
     });
+    it('should add root path when signal url defined in env contains no path and no root path', () => {
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.bar';
+      const collectorExporter = new OTLPTraceExporter();
+      assert.strictEqual(
+        collectorExporter.url,
+        `${envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT}/`
+      );
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = '';
+    });
+    it('should not add root path when signal url defined in env contains root path but no path', () => {
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.bar/';
+      const collectorExporter = new OTLPTraceExporter();
+      assert.strictEqual(
+        collectorExporter.url,
+        `${envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT}`
+      );
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = '';
+    });
+    it('should not add root path when signal url defined in env contains path', () => {
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.bar/v1/traces';
+      const collectorExporter = new OTLPTraceExporter();
+      assert.strictEqual(
+        collectorExporter.url,
+        `${envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT}`
+      );
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = '';
+    });
+    it('should not add root path when signal url defined in env contains path and ends in /', () => {
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.bar/v1/traces/';
+      const collectorExporter = new OTLPTraceExporter();
+      assert.strictEqual(
+        collectorExporter.url,
+        `${envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT}`
+      );
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = '';
+    });
     it('should use headers defined via env', () => {
       envSource.OTEL_EXPORTER_OTLP_HEADERS = 'foo=bar';
       const collectorExporter = new OTLPTraceExporter();

diff --git a/experimental/packages/exporter-trace-otlp-proto/src/OTLPTraceExporter.ts b/experimental/packages/exporter-trace-otlp-proto/src/OTLPTraceExporter.ts
@@ -16,12 +16,16 @@
 
 import { ReadableSpan, SpanExporter } from '@opentelemetry/sdk-trace-base';
 import { getEnv, baggageUtils } from '@opentelemetry/core';
-import { appendResourcePathToUrlIfNotPresent, OTLPExporterNodeConfigBase } from '@opentelemetry/otlp-exporter-base';
+import {
+  OTLPExporterNodeConfigBase,
+  appendResourcePathToUrl,
+  appendRootPathToUrlIfNeeded
+} from '@opentelemetry/otlp-exporter-base';
 import { OTLPProtoExporterNodeBase, ServiceClientType } from '@opentelemetry/otlp-proto-exporter-base';
 import { createExportTraceServiceRequest, IExportTraceServiceRequest } from '@opentelemetry/otlp-transformer';
 
-const DEFAULT_COLLECTOR_RESOURCE_PATH = '/v1/traces';
-const DEFAULT_COLLECTOR_URL=`http://localhost:4318${DEFAULT_COLLECTOR_RESOURCE_PATH}`;
+const DEFAULT_COLLECTOR_RESOURCE_PATH = 'v1/traces';
+const DEFAULT_COLLECTOR_URL = `http://localhost:4318/${DEFAULT_COLLECTOR_RESOURCE_PATH}`;
 
 /**
  * Collector Trace Exporter for Node with protobuf
@@ -50,9 +54,9 @@ export class OTLPTraceExporter
     return typeof config.url === 'string'
       ? config.url
       : getEnv().OTEL_EXPORTER_OTLP_TRACES_ENDPOINT.length > 0
-        ? getEnv().OTEL_EXPORTER_OTLP_TRACES_ENDPOINT
+        ? appendRootPathToUrlIfNeeded(getEnv().OTEL_EXPORTER_OTLP_TRACES_ENDPOINT, DEFAULT_COLLECTOR_RESOURCE_PATH)
         : getEnv().OTEL_EXPORTER_OTLP_ENDPOINT.length > 0
-          ? appendResourcePathToUrlIfNotPresent(getEnv().OTEL_EXPORTER_OTLP_ENDPOINT, DEFAULT_COLLECTOR_RESOURCE_PATH)
+          ? appendResourcePathToUrl(getEnv().OTEL_EXPORTER_OTLP_ENDPOINT, DEFAULT_COLLECTOR_RESOURCE_PATH)
           : DEFAULT_COLLECTOR_URL;
   }
 

diff --git a/experimental/packages/exporter-trace-otlp-proto/test/OTLPTraceExporter.test.ts b/experimental/packages/exporter-trace-otlp-proto/test/OTLPTraceExporter.test.ts
@@ -47,16 +47,25 @@ describe('OTLPTraceExporter - node with proto over http', () => {
 
   describe('when configuring via environment', () => {
     const envSource = process.env;
-    it('should use url defined in env', () => {
+    it('should use url defined in env that ends with root path and append version and signal path', () => {
+      envSource.OTEL_EXPORTER_OTLP_ENDPOINT = 'http://foo.bar/';
+      const collectorExporter = new OTLPTraceExporter();
+      assert.strictEqual(
+        collectorExporter.url,
+        `${envSource.OTEL_EXPORTER_OTLP_ENDPOINT}v1/traces`
+      );
+      envSource.OTEL_EXPORTER_OTLP_ENDPOINT = '';
+    });
+    it('should use url defined in env without checking if path is already present', () => {
       envSource.OTEL_EXPORTER_OTLP_ENDPOINT = 'http://foo.bar/v1/traces';
       const collectorExporter = new OTLPTraceExporter();
       assert.strictEqual(
         collectorExporter.url,
-        envSource.OTEL_EXPORTER_OTLP_ENDPOINT
+        `${envSource.OTEL_EXPORTER_OTLP_ENDPOINT}/v1/traces`
       );
       envSource.OTEL_EXPORTER_OTLP_ENDPOINT = '';
     });
-    it('should use url defined in env and append version and signal when not present', () => {
+    it('should use url defined in env and append version and signal', () => {
       envSource.OTEL_EXPORTER_OTLP_ENDPOINT = 'http://foo.bar';
       const collectorExporter = new OTLPTraceExporter();
       assert.strictEqual(
@@ -66,8 +75,8 @@ describe('OTLPTraceExporter - node with proto over http', () => {
       envSource.OTEL_EXPORTER_OTLP_ENDPOINT = '';
     });
     it('should override global exporter url with signal url defined in env', () => {
-      envSource.OTEL_EXPORTER_OTLP_ENDPOINT = 'http://foo.bar';
-      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.traces';
+      envSource.OTEL_EXPORTER_OTLP_ENDPOINT = 'http://foo.bar/';
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.traces/';
       const collectorExporter = new OTLPTraceExporter();
       assert.strictEqual(
         collectorExporter.url,
@@ -76,6 +85,42 @@ describe('OTLPTraceExporter - node with proto over http', () => {
       envSource.OTEL_EXPORTER_OTLP_ENDPOINT = '';
       envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = '';
     });
+    it('should add root path when signal url defined in env contains no path and no root path', () => {
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.bar';
+      const collectorExporter = new OTLPTraceExporter();
+      assert.strictEqual(
+        collectorExporter.url,
+        `${envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT}/`
+      );
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = '';
+    });
+    it('should not add root path when signal url defined in env contains root path but no path', () => {
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.bar/';
+      const collectorExporter = new OTLPTraceExporter();
+      assert.strictEqual(
+        collectorExporter.url,
+        `${envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT}`
+      );
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = '';
+    });
+    it('should not add root path when signal url defined in env contains path', () => {
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.bar/v1/traces';
+      const collectorExporter = new OTLPTraceExporter();
+      assert.strictEqual(
+        collectorExporter.url,
+        `${envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT}`
+      );
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = '';
+    });
+    it('should not add root path when signal url defined in env contains path and ends in /', () => {
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = 'http://foo.bar/v1/traces/';
+      const collectorExporter = new OTLPTraceExporter();
+      assert.strictEqual(
+        collectorExporter.url,
+        `${envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT}`
+      );
+      envSource.OTEL_EXPORTER_OTLP_TRACES_ENDPOINT = '';
+    });
     it('should use headers defined via env', () => {
       envSource.OTEL_EXPORTER_OTLP_HEADERS = 'foo=bar';
       const collectorExporter = new OTLPTraceExporter();

diff --git a/...kages/opentelemetry-exporter-metrics-otlp-http/src/platform/browser/OTLPMetricExporter.ts b/...kages/opentelemetry-exporter-metrics-otlp-http/src/platform/browser/OTLPMetricExporter.ts
@@ -19,14 +19,15 @@ import { baggageUtils, getEnv } from '@opentelemetry/core';
 import { defaultOptions, OTLPMetricExporterOptions } from '../../OTLPMetricExporterOptions';
 import { OTLPMetricExporterBase } from '../../OTLPMetricExporterBase';
 import {
-  appendResourcePathToUrlIfNotPresent,
   OTLPExporterBrowserBase,
-  OTLPExporterConfigBase
+  OTLPExporterConfigBase,
+  appendResourcePathToUrl,
+  appendRootPathToUrlIfNeeded
 } from '@opentelemetry/otlp-exporter-base';
 import { createExportMetricsServiceRequest, IExportMetricsServiceRequest } from '@opentelemetry/otlp-transformer';
 
-const DEFAULT_COLLECTOR_RESOURCE_PATH = '/v1/metrics';
-const DEFAULT_COLLECTOR_URL = `http://localhost:4318${DEFAULT_COLLECTOR_RESOURCE_PATH}`;
+const DEFAULT_COLLECTOR_RESOURCE_PATH = 'v1/metrics';
+const DEFAULT_COLLECTOR_URL = `http://localhost:4318/${DEFAULT_COLLECTOR_RESOURCE_PATH}`;
 
 class OTLPExporterBrowserProxy extends OTLPExporterBrowserBase<ResourceMetrics, IExportMetricsServiceRequest> {
 
@@ -44,9 +45,9 @@ class OTLPExporterBrowserProxy extends OTLPExporterBrowserBase<ResourceMetrics,
     return typeof config.url === 'string'
       ? config.url
       : getEnv().OTEL_EXPORTER_OTLP_METRICS_ENDPOINT.length > 0
-        ? getEnv().OTEL_EXPORTER_OTLP_METRICS_ENDPOINT
+        ? appendRootPathToUrlIfNeeded(getEnv().OTEL_EXPORTER_OTLP_METRICS_ENDPOINT, DEFAULT_COLLECTOR_RESOURCE_PATH)
         : getEnv().OTEL_EXPORTER_OTLP_ENDPOINT.length > 0
-          ? appendResourcePathToUrlIfNotPresent(getEnv().OTEL_EXPORTER_OTLP_ENDPOINT, DEFAULT_COLLECTOR_RESOURCE_PATH)
+          ? appendResourcePathToUrl(getEnv().OTEL_EXPORTER_OTLP_ENDPOINT, DEFAULT_COLLECTOR_RESOURCE_PATH)
           : DEFAULT_COLLECTOR_URL;
   }