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feat: Verify server header. #279

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Merged
goloroden merged 2 commits into from
Oct 13, 2025
Merged

feat: Verify server header. #279

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b11ceaa
feat: Verify server header.
goloroden Oct 12, 2025
edbfd65
Merge branch 'main' into add-check-for-server-header
goloroden Oct 13, 2025
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61 changes: 61 additions & 0 deletions src/Client.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@ import type { Event } from './Event.js';
import type { EventCandidate } from './EventCandidate.js';
import type { EventType } from './EventType.js';
import { isCloudEvent } from './isCloudEvent.js';
import { isValidServerHeader } from './isValidServerHeader.js';
import { readNdJsonStream } from './ndjson/readNdJsonStream.js';
import type { ObserveEventsOptions } from './ObserveEventsOptions.js';
import type { Precondition } from './Precondition.js';
Expand Down Expand Up @@ -49,6 +50,10 @@ class Client {
method: 'get',
});

if (!isValidServerHeader(response)) {
throw new Error('Server must be EventSourcingDB.');
}

if (response.status !== 200) {
throw new Error(`Failed to ping, got HTTP status code '${response.status}', expected '200'.`);
}
Expand Down Expand Up @@ -77,6 +82,10 @@ class Client {
},
});

if (!isValidServerHeader(response)) {
throw new Error('Server must be EventSourcingDB.');
}

if (response.status !== 200) {
throw new Error(
`Failed to verify API token, got HTTP status code '${response.status}', expected '200'.`,
Expand Down Expand Up @@ -115,6 +124,10 @@ class Client {
}),
});

if (!isValidServerHeader(response)) {
throw new Error('Server must be EventSourcingDB.');
}

if (response.status !== 200) {
throw new Error(
`Failed to write events, got HTTP status code '${response.status}', expected '200'.`,
Expand Down Expand Up @@ -174,6 +187,14 @@ class Client {
signal: combinedSignal,
});

if (!isValidServerHeader(response)) {
const serverHeader = response.headers.get('Server');
if (!serverHeader) {
throw new Error('Server must be EventSourcingDB, but Server header is missing.');
}
throw new Error(`Server must be EventSourcingDB, got Server header: '${serverHeader}'.`);
}

if (response.status !== 200) {
throw new Error(
`Failed to read events, got HTTP status code '${response.status}', expected '200'.`,
Expand Down Expand Up @@ -239,6 +260,14 @@ class Client {
signal: combinedSignal,
});

if (!isValidServerHeader(response)) {
const serverHeader = response.headers.get('Server');
if (!serverHeader) {
throw new Error('Server must be EventSourcingDB, but Server header is missing.');
}
throw new Error(`Server must be EventSourcingDB, got Server header: '${serverHeader}'.`);
}

if (response.status !== 200) {
throw new Error(
`Failed to run EventQL query, got HTTP status code '${response.status}', expected '200'.`,
Expand Down Expand Up @@ -314,6 +343,14 @@ class Client {
signal: combinedSignal,
});

if (!isValidServerHeader(response)) {
const serverHeader = response.headers.get('Server');
if (!serverHeader) {
throw new Error('Server must be EventSourcingDB, but Server header is missing.');
}
throw new Error(`Server must be EventSourcingDB, got Server header: '${serverHeader}'.`);
}

if (response.status !== 200) {
throw new Error(
`Failed to observe events, got HTTP status code '${response.status}', expected '200'.`,
Expand Down Expand Up @@ -371,6 +408,10 @@ class Client {
}),
});

if (!isValidServerHeader(response)) {
throw new Error('Server must be EventSourcingDB.');
}

if (response.status !== 200) {
throw new Error(
`Failed to register event schema, got HTTP status code '${response.status}', expected '200'.`,
Expand Down Expand Up @@ -411,6 +452,14 @@ class Client {
signal: combinedSignal,
});

if (!isValidServerHeader(response)) {
const serverHeader = response.headers.get('Server');
if (!serverHeader) {
throw new Error('Server must be EventSourcingDB, but Server header is missing.');
}
throw new Error(`Server must be EventSourcingDB, got Server header: '${serverHeader}'.`);
}

if (response.status !== 200) {
throw new Error(
`Failed to read subjects, got HTTP status code '${response.status}', expected '200'.`,
Expand Down Expand Up @@ -460,6 +509,10 @@ class Client {
}),
});

if (!isValidServerHeader(response)) {
throw new Error('Server must be EventSourcingDB.');
}

if (response.status !== 200) {
throw new Error(
`Failed to read event type, got HTTP status code '${response.status}', expected '200'.`,
Expand Down Expand Up @@ -504,6 +557,14 @@ class Client {
signal: combinedSignal,
});

if (!isValidServerHeader(response)) {
const serverHeader = response.headers.get('Server');
if (!serverHeader) {
throw new Error('Server must be EventSourcingDB, but Server header is missing.');
}
throw new Error(`Server must be EventSourcingDB, got Server header: '${serverHeader}'.`);
}

if (response.status !== 200) {
throw new Error(
`Failed to read event types, got HTTP status code '${response.status}', expected '200'.`,
Expand Down
15 changes: 15 additions & 0 deletions src/isValidServerHeader.ts
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Original file line number Diff line number Diff line change
@@ -0,0 +1,15 @@
const isValidServerHeader = (response: Response): boolean => {
const serverHeader = response.headers.get('Server');

if (!serverHeader) {
return false;
}

if (!serverHeader.startsWith('EventSourcingDB/')) {
return false;
}

return true;
};

export { isValidServerHeader };