[BUG] %2FJ consider as illegal char

[Krishnaa336]

When uploading a ZIP file to Azure Blob Storage, the file upload itself succeeds, but the call to setHttpHeaders() fails with an “illegal characters in URL path” error. This only happens when the file name starts with an uppercase J. The same flow works as expected when the file name starts with a lowercase j.

The URI contain illegal characters: /containerName/folderName%2Fdev%2F2026-03-26%2FJL810098.zip?comp=properties

com.azure.storage.common.implementation.StorageImplUtils.sendRequest(StorageImplUtils.java:511)\r\n\tat com.azure.storage.blob.specialized.BlobClientBase.setHttpHeadersWithResponse(BlobClientBase.java:1832)\r\n\tat com.azure.storage.blob.specialized.BlobClientBase.setHttpHeaders(BlobClientBase.java:1788)\r\n\tat

Steps to reproduce the behavior:
BlobClient blobClient = container.getBlobClient(blobName);
try (InputStream in = Files.newInputStream(zipPath)) {
blobClient.upload(in, Files.size(zipPath), true);
blobClient.setHttpHeaders(new BlobHttpHeaders().setContentType("application/zip"));
}

• OS: Windons
• IDE: intellij
• Library/Libraries: azure-storage-blob-12.31.2
• Java version: 17

[github-actions]

@browndav-msft @gunjansingh-msft @ibrandes @kyleknap @seanmcc-msft

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