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Resolve copy promises #2038

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Resolve copy promises #2038

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5340328
Resolve copy promises
sjawhar Nov 20, 2024
913a021
Update cp.ts
sjawhar Nov 20, 2024
10c7f1c
Update cp.ts
sjawhar Nov 20, 2024
eef93d6
.on('close') instead of .onclose =
sjawhar Nov 23, 2024
5fc727f
Don't resolve twice
sjawhar Nov 29, 2024
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.on('close') instead of .onclose =
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@sjawhar
sjawhar committed Nov 23, 2024
commit eef93d60b3deba3072b6cabcb866d46cc5a8b526
8 changes: 4 additions & 4 deletions src/cp.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -67,9 +67,9 @@ export class Cp {
},
)
.then((conn) => {
conn.onclose = (event) => {
conn.on('close', () => {
resolve();
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There is a resolve above at line 63. I don't think that this resolve is required. In fact I'm not sure it's what we want, because this will resolve when the websocket is returned. We want to resolve when the copy completes.

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@sjawhar sjawhar Nov 22, 2024 •
edited
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That callback only gets called if status != null:

javascript/src/exec.ts

Lines 53 to 62 in 8db906a

const conn = await this.handler.connect(path, null, (streamNum: number, buff: Buffer): boolean => {
const status = WebSocketHandler.handleStandardStreams(streamNum, buff, stdout, stderr);
if (status != null) {
if (statusCallback) {
statusCallback(status);
}
return false;
}
return true;
});

For copies (or maybe for all exec calls that use stdin), status == null, so the callback never gets called, so the promise never resolves. awaiting calls to cpToPod hang forever.

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@sjawhar sjawhar Nov 22, 2024 •
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If the copy isn't complete when the websocket connection is closed, how can the caller ever know that it has completed?

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Ah, I missed that you are doing this on the 'close' event. My mistake. But we should probably make sure that we don't resolve the promise twice.

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OK, added a check for that in a way that shouldn't cause things to break if changes elsewhere cause this logic to change.

};
});
})
.catch(reject);
});
Expand Down Expand Up @@ -121,9 +121,9 @@ export class Cp {
},
)
.then((conn) => {
conn.onclose = (event) => {
conn.on('close', () => {
resolve();
};
});
})
.catch(reject);
});
Expand Down