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Graph/multipart-upload-integration-drift

AntiPattern

Multipart Upload Integration Drift

multipart-upload-integration-drift

Client-side multipart upload flows drift from what the backend expects—mis-set headers/metadata, inability to inspect part/file sizes, and buffering entire payloads to tmp—causing incorrect object keys, missing/garbled metadata, or uploads that fail under size limits.

Node Details

Public graph metadata

Updated7/28/2026

Connections

30 linked nodes

MATCHESSolution

the issue was that I was passing in the Data URI as well with the encoding of the file. Outcome: make sure that the string of the file that you're sending doesn't contain this value: `data:@file/png;base64,`.

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You can use the `prefix` field to set a sub-directory. — vercelBlobStorage({ enabled: true, collections: { media: { prefix: 'cms_images', }, }, token: process.env.BLOB_READ_WRITE_TOKEN, }). Tension: As of now, there's no fix for this. Outcome: You can manually handle uploads as shown here.

MATCHESSolution

Store uploads in the serverless writable temp directory (os.tmpdir()) during the request and then persist the files externally (e.g., upload to object storage like S3) or stream them directly; update the Multer storage destination to use os.tmpdir() and avoid serving from a project-local uploads folder.

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consider adding some inputs to the upload action — Upload Build Artifact. Tension: artifact not found for name: build.

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JavaScript can access the `size` from the File object — using a UI for the upload. Tension: I really would not like to get the file in any endpoint of my application. Outcome: Use this value to populate the `content-length` header value.

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As of 5/8/2025, the only known workaround is to download the file and upload it using LocalBlob. Tension: the only known workaround. Outcome: download the file and upload it using LocalBlob.

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Those values require encoding per RFC 2047 — Using `x-amz-meta-filename` suggests that the user-provided meta-data is transferred via HTTP request headers. Tension: This does not work with AWS. Outcome: One Idea was to use the Base64 encoding and do the wrapping/quoting/envelope with string concatenation.

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Adding http-auth-2.30.4.jar to the classpath — Exception while uploading a file to AWS S3. Outcome: resolves this issue and the Exception no longer occurs.

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adding a class that extends `OutputStream` and creates a multi-part upload when the buffer reaches the set limit — AWS minimum is 5MB. Tension: end size of the zip can be tens of GB. Outcome: I set it to 10MB.

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I needed to use the MultipartCopy class found in the S3 SDK. Tension: Over 4.5 GB - Use MultipartCopy. Outcome: This is now working...

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The filesize metadata was a number — in the lambda. Tension: I just hadn't ensured that my metadata values were all strings. Outcome: once I converted it to a string in the lambda and added that value to the metadata all was well.

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Temporarily tweak the replication settings of your S3 bucket — Upload a test file to the source bucket in the active region. Tension: Since we intentionally modified the replication configuration, this action is expected to lead to a replication failure. Outcome: After completing the testing phase, restore the replication configuration to its original state to return to normal replication behavior.

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var md5Based64 = Convert.ToBase64Str — Upload using RestSharp: (failed - Bad Digest). Tension: BadDigest - The Content-MD5 you specified did not match what we received. Outcome: both have the same inputs.

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upload an empty folder and specify the following settings in the upload configuration. — If your bucket policy prevents uploading objects to this bucket without tags, metadata, or access control list (ACL) grantees. Tension: you can't create a folder by using the following procedure. Outcome: Instead, upload an empty folder and specify the following settings in the upload configuration.

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change array to fields to get both photos and video — router.post('/media', upload.fields([{ name: 'videos', maxCount: 5 }, { name: 'photos', maxCount: 10 }]), async (req, res) => {. Tension: dont forget to add the photos name in your schema. Outcome: change array to fields to get both photos and video.

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You may want to consider configuring your S3 bucket's CORS configuration — to allow specific websites served from other domains to pull your image and display it. Tension: You are serving a mix of HTTP and HTTPS content which often results to this problem. Outcome: hosting the image on a local server that runs on top of HTTP to make sure that all content is hosted on HTTP.

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For multipart + pre-signed uploads from expo react-native with express backend is as follows: — upload a large video file the fastest on RN Expo.

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const resizedImageBuffer = await sharp(file) — async function uploadImageToS3(. Tension: I tried using formidable and multer but both soltions are not working. Outcome: .resize(400, 500) // Specify your desired width or height for resizing.

MATCHESSolution

Just changing the order of the form data in the frontend code worked for me. — uploading the file from Browser. Tension: Aws error message was misleading. Outcome: I just interchanged the position of `x-amz-signature` and `x-amz-security-token`.

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Use a collection with upload: true, submit a FormData POST to /api/media with file, then update the document with the returned file id

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after submitting. Tension: This is likely not what you intended. Outcome: startTransition(() => { formAction(newFormData); });.

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Use the supported approach for Next.js app-route handling—e.g., switch to `formidable` (as suggested) to handle multipart uploads and read the file without relying on the deprecated `bodyParser.sizeLimit` config. Alternatively, move the endpoint to the `pages` directory if you need to use `export const config` bodyParser settings there.

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Move reader.readAsDataURL(file) outside reader.onload and call it after setting the handlers

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Only allow specific file types (JPG, PNG) and impose size limits (OWASP) — Input Validation and Sanitization. Tension: prevent injection attacks. Outcome: Validate and sanitize all uploaded images.

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What to do once the request stream size exceeded the limit? — I'm building a file upload handling library in Node.js. Tension: I want to know how to close the request so that no further data can be sent over the wire and waste the server resources. Outcome: you must use promise object which is stable to handle asyncronous tasks.

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Submit the form as POST while overriding the method using the `_method: 'patch'` field, and ensure `forceFormData: true` is set so the file is sent as multipart data.

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large file uploads in Spring Boot. Tension: you never hit this limit. Outcome: Once I stopped sending the file in JSON, the problem disappeared.

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select the multipart data radio button — Postman typically handles the specifics of the multipart request. Tension: Did you manually specify a Content-Type header of multipart/form-data? Outcome: Postman would be more complex like this, for example:.

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And multipart file locationCreateFile = fileUpload. Tension: the API consistently picks up the old file instead of the modified version. Outcome: Then status 200.

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switch POST /api/embeddings {"model":..,"prompt":..} → .embedding|length to the modern POST /api/embed {"model":..,"input":..} → .embeddings[0]|length — Confirmed live against Ollama (snowflake-arctic-embed:335m): old endpoint returns HTTP 500 with body {"error":"the input length exceeds the context length"} on a 3630-char input. Tension: replace the lexical-search health check with a genuine semantic round-trip. Outcome: new endpoint returns HTTP 200 with a correct 1024-d vector for the identical input.

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