Convert io.ReadCloser to a String

Jun 10, 2016 · 104 words · 1 minute read #buffer #bytes #closer #get #io #read #string #readcloser #convert

Net/http is an amazing package but there are times you need to work with the body text of the response returned from the call you just made. Many functions require a string as input so we have to convert it first by passing it through a buffer.

package main

import (
    "fmt"
    "net/http"
    "bytes"
)

func main() {
    response, _ := http.Get("https://golangcode.com/")

    // The line below would fail because Body = io.ReadCloser
    // fmt.Printf(response.Body)

    // ...so we convert it to a string by passing it through 
    // a buffer first. A 'costly' but useful process.
    buf := new(bytes.Buffer)
    buf.ReadFrom(response.Body)
    newStr := buf.String()

    fmt.Printf(newStr)
}

Get the HTTP Method from a Request – Jun 8, 2018
When working with any form of http communication in Go you’re going to come across scenarios where you need to know a request’s method - whether it’s a GET, POST, etc. If you’re writing an API with Go you’ll most likely have the incoming request in the form of a http.Request object. This request has Method property which allows you to get the http method in the form of a string.
AWS Lambda PDF Generator – May 29, 2018
This is an example of how to convert HTML code into a PDF using AWS’ Lambda service and S3 Triggers. So that once a HTML file is upload to S3 it will automatically be converted into a PDF which should appear in the same bucket shortly after - all using a serverless function. To do this, other than the standard library, we’re using a Go wkhtmltopdf library and the Go AWS sdk.
Substring: How to Split a String – May 5, 2018
In the example below we are looking at how to take the first x number of characters from the start of a string. If we know a character we want to separate on, like a space, we can use strings.Split() instead. But for this we’re looking to get the first 6 characters as a new string. To do this we first convert it into a rune, allowing for better support in different languages and allowing us to use it like an array.

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Author: Edd Turtle

Edd is the Lead Developer at Hoowla, a prop-tech startup, where he spends much of his time working on production-ready Go and PHP code.

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