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19 lines
857 B
Markdown
19 lines
857 B
Markdown
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contentType: howto
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---
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# Get the binary data buffer
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The binary data buffer contains all the binary file data processed by a workflow. You need to access it if you want to perform operations on the binary data, such as:
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* Manipulating the data: for example, adding column headers to a CSV file.
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* Using the data in calculations: for example, calculating a hash value based on it.
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* Complex HTTP requests: for example, combining file upload with sending other data formats.
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You can access the buffer using n8n's `getBinaryDataBuffer()` function:
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```js
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let binaryDataBufferItem = await this.helpers.getBinaryDataBuffer(itemIndex, binaryPropertyName);
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```
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You should always use the `getBinaryDataBuffer()` function, and avoid using older methods of directly accessing the buffer, such as targeting it with expressions like `items[0].binary.data.data`. |