fix: export WebFormData #559
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WalkthroughThe changes introduce a new export named Changes
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Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@
## master #559 +/- ##
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Coverage 94.62% 94.62%
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Files 11 11
Lines 1227 1227
Branches 298 296 -2
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Hits 1161 1161
Misses 62 62
Partials 4 4 ☔ View full report in Codecov by Sentry. |
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Actionable comments posted: 2
🧹 Outside diff range and nitpick comments (9)
test/fixtures/BufferStream.ts (6)
14-17: Make thereallocmethod privateThe
reallocmethod is an internal utility and should not be part of the public API.Apply this diff to make the method private:
-export function realloc() { +private realloc() {
23-24: Translate comments to English for broader accessibilityThe comments on lines 23 to 24 are in Chinese, which may not be understood by all contributors.
Consider translating these comments to English:
-// 缓冲区未满 -// - 向缓冲区写入 +// Buffer is not full +// - Write to the buffer
31-34: Translate comments to English for consistencyThe comments explaining the condition when the buffer is exactly full are in Chinese.
Translate the comments for clarity:
-// 缓冲区正好满 -// - 拷贝到缓冲区以后, 将 chunk 返回 -// - 刷新缓冲区 +// Buffer is exactly full +// - Copy into the buffer, then push the chunk +// - Refresh the buffer
41-44: Translate comments to English for better understandingThe comments describing the scenario when the buffer size is exceeded are in Chinese.
Translate the comments for clarity:
-// 超过缓冲区大小 -// - 拷贝到缓冲区以后, 将 chunk 返回 -// - 刷新缓冲区 -// - 将超出的部分拷贝到新的缓冲区中 +// Buffer size exceeded +// - Copy into the buffer, then push the chunk +// - Refresh the buffer +// - Copy the remaining data into the new buffer
52-55: Handle large chunks more efficientlyIn the special case where the incoming chunk is larger than
BUF_SIZE, the code directly pushes the sliced chunk. However, this could be optimized.Consider avoiding the buffering of extremely large chunks altogether and handling them separately to improve performance.
65-68: Optimize buffer handling in the_flushmethodAllocating a new buffer and copying data may introduce unnecessary overhead.
You can push the existing buffer slice directly:
-if (this.offset) { - const chunk = Buffer.alloc(this.offset); - this.buf.copy(chunk); - this.push(chunk); - this.offset = 0; +if (this.offset > 0) { + this.push(this.buf.slice(0, this.offset)); + this.offset = 0; }test/formData-with-BufferStream.test.ts (2)
23-25: Missing error handling for streamsThere is no error handling for
fileStreamandbufferStream, which could lead to unhandled exceptions if an error occurs during the streaming process.Add error listeners to handle potential stream errors:
... fileStream.on('error', (err) => { // Handle file stream error console.error('File stream error:', err); }); bufferStream.on('error', (err) => { // Handle buffer stream error console.error('Buffer stream error:', err); }); ...
31-37: Consider using a singleHttpClientinstance for all testsCreating a new
HttpClientinstance within each test may not be necessary and could add overhead.Instantiate the
HttpClientonce in thebeforeAllhook:let close: any; let _url: string; +let httpClient: HttpClient; beforeAll(async () => { const { closeServer, url } = await startServer(); close = closeServer; _url = url; + httpClient = new HttpClient(); });And then use
httpClientin your tests.src/index.ts (1)
71-71: Potential naming confusion withWebFormDataexportWhile exporting
FormDataasWebFormDatahelps distinguish it from Node.jsFormData, it may still cause confusion due to the similar naming.Consider providing documentation or using a more distinctive name to clarify the difference between the two. Alternatively, if both
FormDataimplementations are needed, explicitly export both:-export { FormData as WebFormData } from './FormData.js'; +export { FormData as WebFormData, FormData as NodeFormData } from './FormData.js';
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📒 Files selected for processing (3)
src/index.ts(1 hunks)test/fixtures/BufferStream.ts(1 hunks)test/formData-with-BufferStream.test.ts(1 hunks)
🔇 Additional comments (1)
src/index.ts (1)
71-71: Verify the impact of the new export on existing code
Adding a new export may affect existing imports in the codebase if there are modules that rely on the default FormData export.
Run the following script to search for existing imports of FormData and assess whether they need to be updated:
✅ Verification successful
The previous search had syntax issues, but we found some initial insights. Let's verify:
- If any files are importing FormData directly from index.ts
- If there are any default imports that might be affected
- The actual FormData implementation to understand the export structure
No impact from the new export alias
The verification shows that the change is safe because:
FormDatais already exported from./FormData.jsand only used internally byHttpClient.ts- The new export
WebFormDatais just an alias that doesn't modify the existing export - No files in the codebase import
FormDatadirectly fromindex.ts - The implementation in
FormData.tsshows it's a class that extendsform-datapackage, and this structure remains unchanged
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Find all occurrences of FormData imports.
# Search for import statements importing FormData from index.ts
rg "import\s+{\s*FormData\s*}" -t js -t ts
# Search for code using FormData
rg "\bFormData\b" -t js -t ts
Length of output: 475
Script:
#!/bin/bash
# Let's check if there are any direct imports of FormData from index.ts
rg "from ['\"]\./index" -A 2 -t ts -t js
# Also check for any imports that might be using the default export
rg "import FormData from|import \* as .* from ['\"]\./index" -t ts -t js
# And check the actual FormData.ts implementation to understand the export
cat src/FormData.ts
Length of output: 1500
| export class BufferStream extends Transform { | ||
| private buf: Buffer; | ||
| private offset: number; | ||
|
|
||
| constructor(options?: any) { | ||
| super(options); | ||
| this.realloc(); | ||
| } | ||
|
|
||
| realloc() { | ||
| this.buf = Buffer.alloc(BUF_SIZE); | ||
| this.offset = 0; | ||
| } | ||
|
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| _transform(chunk: Buffer, _: any, callback: any) { | ||
| const currentLength = this.offset; | ||
| const chunkSize = chunk.length; | ||
| const newSize = currentLength + chunkSize; | ||
| // 缓冲区未满 | ||
| // - 向缓冲区写入 | ||
| if (newSize < BUF_SIZE) { | ||
| chunk.copy(this.buf, currentLength); | ||
| this.offset += chunkSize; | ||
| return callback(); | ||
| } | ||
|
|
||
| // 缓冲区正好满 | ||
| // - 拷贝到缓冲区以后, 将 chunk 返回 | ||
| // - 刷新缓冲区 | ||
| if (newSize === BUF_SIZE) { | ||
| chunk.copy(this.buf, currentLength); | ||
| const writeChunk = this.buf; | ||
| this.realloc(); | ||
| return callback(null, writeChunk); | ||
| } | ||
|
|
||
| // 超过缓冲区大小 | ||
| // - 拷贝到缓冲区以后, 将 chunk 返回 | ||
| // - 刷新缓冲区 | ||
| // - 将超出的部分拷贝到新的缓冲区中 | ||
| const copyLength = BUF_SIZE - currentLength; | ||
| const remainLength = chunkSize - copyLength; | ||
| chunk.copy(this.buf, currentLength, 0, copyLength); | ||
| const writeChunk = this.buf; | ||
| this.push(writeChunk); | ||
| this.realloc(); | ||
|
|
||
| if (remainLength > BUF_SIZE) { | ||
| // 特殊情况: 给了一个超大 chunk | ||
| // 直接将这个 chunk 返回，没必要缓冲了 | ||
| this.push(chunk.slice(copyLength)); | ||
| } else { | ||
| chunk.copy(this.buf, 0, copyLength); | ||
| this.offset = remainLength; | ||
| } | ||
| return callback(null); | ||
| } | ||
|
|
||
| _flush(callback: any) { | ||
| if (this.offset) { | ||
| const chunk = Buffer.alloc(this.offset); | ||
| this.buf.copy(chunk); | ||
| this.push(chunk); | ||
| this.offset = 0; | ||
| } | ||
| callback(); | ||
| } | ||
| } |
There was a problem hiding this comment.
Potential memory leak due to improper backpressure handling
The BufferStream class does not handle backpressure correctly. When the internal buffer reaches its limit, the stream continues to accept data without pausing the upstream source. This can lead to increased memory usage and potential memory leaks when dealing with large or continuous data streams.
To fix this issue, implement proper backpressure handling by checking the this.push() method's return value. If it returns false, you should pause reading data until the drain event is emitted.
Apply this diff to modify the _transform method:
...
- this.push(writeChunk);
+ const canContinue = this.push(writeChunk);
+ if (!canContinue) {
+ this._inputPaused = true;
+ }
...Additionally, listen for the 'drain' event to resume processing:
+ constructor(options?: any) {
+ super(options);
+ this.realloc();
+ this._inputPaused = false;
+ this.on('drain', () => {
+ this._inputPaused = false;
+ });
+ }And modify the _transform method to handle the pause state:
- return callback();
+ if (this._inputPaused) {
+ // Pause the upstream source
+ this.pause();
+ }
+ callback();Committable suggestion skipped: line range outside the PR's diff.
| it('should post with BufferStream', async () => { | ||
| const fileStream = createReadStream(__filename); | ||
| const bufferStream = new BufferStream(); | ||
| fileStream.pipe(bufferStream); | ||
| const formData = new WebFormData(); | ||
| const fileName = basename(__filename); | ||
| formData.append('fileBufferStream', bufferStream, fileName); | ||
| formData.append('foo', 'bar'); | ||
|
|
||
| const httpClient = new HttpClient(); | ||
| const response = await httpClient.request(`${_url}multipart`, { | ||
| method: 'POST', | ||
| content: formData, | ||
| headers: formData.getHeaders(), | ||
| dataType: 'json', | ||
| }); | ||
| assert.equal(response.status, 200); | ||
| // console.log(response.data); | ||
| assert.equal(response.data.files.fileBufferStream.filename, 'formData-with-BufferStream.test.ts'); | ||
| assert.deepEqual(response.data.form, { foo: 'bar' }); | ||
| }); |
There was a problem hiding this comment.
Ensure proper handling of piped streams
When piping fileStream into bufferStream, there is no guarantee that all data has been read before making the HTTP request. This could result in incomplete data being sent.
Consider awaiting the end of the stream before sending the request:
-fileStream.pipe(bufferStream);
+await new Promise((resolve, reject) => {
+ fileStream.pipe(bufferStream);
+ bufferStream.on('finish', resolve);
+ bufferStream.on('error', reject);
+});Alternatively, handle backpressure appropriately or redesign the test to account for asynchronous stream processing.
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| it('should post with BufferStream', async () => { | |
| const fileStream = createReadStream(__filename); | |
| const bufferStream = new BufferStream(); | |
| fileStream.pipe(bufferStream); | |
| const formData = new WebFormData(); | |
| const fileName = basename(__filename); | |
| formData.append('fileBufferStream', bufferStream, fileName); | |
| formData.append('foo', 'bar'); | |
| const httpClient = new HttpClient(); | |
| const response = await httpClient.request(`${_url}multipart`, { | |
| method: 'POST', | |
| content: formData, | |
| headers: formData.getHeaders(), | |
| dataType: 'json', | |
| }); | |
| assert.equal(response.status, 200); | |
| // console.log(response.data); | |
| assert.equal(response.data.files.fileBufferStream.filename, 'formData-with-BufferStream.test.ts'); | |
| assert.deepEqual(response.data.form, { foo: 'bar' }); | |
| }); | |
| it('should post with BufferStream', async () => { | |
| const fileStream = createReadStream(__filename); | |
| const bufferStream = new BufferStream(); | |
| await new Promise((resolve, reject) => { | |
| fileStream.pipe(bufferStream); | |
| bufferStream.on('finish', resolve); | |
| bufferStream.on('error', reject); | |
| }); | |
| const formData = new WebFormData(); | |
| const fileName = basename(__filename); | |
| formData.append('fileBufferStream', bufferStream, fileName); | |
| formData.append('foo', 'bar'); | |
| const httpClient = new HttpClient(); | |
| const response = await httpClient.request(`${_url}multipart`, { | |
| method: 'POST', | |
| content: formData, | |
| headers: formData.getHeaders(), | |
| dataType: 'json', | |
| }); | |
| assert.equal(response.status, 200); | |
| // console.log(response.data); | |
| assert.equal(response.data.files.fileBufferStream.filename, 'formData-with-BufferStream.test.ts'); | |
| assert.deepEqual(response.data.form, { foo: 'bar' }); | |
| }); |
[skip ci] ## [4.6.4](v4.6.3...v4.6.4) (2024-12-06) ### Bug Fixes * export WebFormData ([#559](#559)) ([dec6b12](dec6b12))
Summary by CodeRabbit
New Features
WebFormDataas an alternative export forFormData, enhancing compatibility and clarity.BufferStreamclass to manage data chunk buffering efficiently.Tests
BufferStreamwithWebFormData.