Kotlin Multiplatform project where users can select a profile picture from the gallery? If so, you might have encountered an issue when trying to send a UIImage as binary data to AWS API Gateway. In this blog post, we’ll explore the process of converting a UIImage to a ByteArray in iOS, discuss the required content-type, and address the “Bad content-type format” error that you might encounter during execution. Let’s dive in and find a solution!
The UIImage to ByteArray Conversion Process
- Understanding the Kotlin code for converting a UIImage to a ByteArray
- Center cropping the selected profile picture
- Converting UIImage to a cropped UIImage
- Generating a NSData representation of the cropped UIImage
- Transforming NSData to a ByteArray
Sending ByteArray to AWS API Gateway using Ktor
- Configuring the HTTP client in your Kotlin Multiplatform project
- Composing the API endpoint URL for AWS API Gateway
- Specifying the content-type as image/png
- Adding the “X-Api-Key” header for authorization
- Sending the ByteArray as the request body
The “Bad content-type format” Error
- Understanding the error message and its implications
- Verifying the compatibility of content-type with AWS API Gateway
- Checking the execution flow on the iOS side
- Comparing the Android implementation to identify potential differences
Troubleshooting and Resolving the Error
- Ensuring the content-type is correctly set as image/png
- Validating the AWS API Gateway configuration
- Verifying the client implementation in Ktor
- Checking for any encoding or charset conflicts
- Testing the solution and verifying successful transmission
Conclusion:
Sending a UIImage as binary data to AWS API Gateway requires careful handling of the conversion process and accurate configuration of content-type. In this blog post, we explored the conversion of a UIImage to a ByteArray in iOS and the subsequent transmission to AWS API Gateway using Ktor. We also addressed the “Bad content-type format” error that you might encounter during execution. By following the troubleshooting steps and ensuring proper configuration, you can successfully send UIImage data to AWS API Gateway and enhance the functionality of your Kotlin Multiplatform project. Happy coding!
