How Can I Read the Contents of a Tar File as Strings Without Extraction?

Reading Contents of a Tar File Without Extraction

In the quest to process tar files without unpacking them to disk, it becomes necessary to read the contents of the files within the archive as strings. This article delves into a solution to this challenge.

The provided code effectively iterates through the files in the tar file. To read the contents of each file as a string, follow these steps:

• Use tar.Reader as an io.Reader: Treat the tar.Reader as an io.Reader for each file you wish to read.
• Obtain the Next File and Header: Retrieve the next file entry and its header using h, _ := tr.Next().
• Read the Entire File: To obtain the complete file content as a string, use bs, _ := ioutil.ReadAll(tr). Convert bs to a string s := string(bs).

• Read Line by Line: If line-by-line reading is preferred, follow these steps:

  • Create a bufio.Scanner using s := bufio.NewScanner(tr)
  • Read line by line using the s.Scan() and s.Text() methods
  • Handle any errors encountered using s.Err()

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