func ExampleNewPipeline() {
logger.LogLevel = logger.LevelSilent
// A basic pipeline is created using one or more DataProcessor instances.
hello := processors.NewIoReader(strings.NewReader("Hello world!"))
stdout := processors.NewIoWriter(os.Stdout)
pipeline := ratchet.NewPipeline(hello, stdout)
err := <-pipeline.Run()
if err != nil {
fmt.Println("An error occurred in the ratchet pipeline:", err.Error())
}
// Output:
// Hello world!
}
func ExampleGetRequest() {
logger.LogLevel = logger.LevelSilent
getGoogle, err := processors.NewHTTPRequest("GET", "http://www.google.com", nil)
if err != nil {
panic(err)
}
// this is just a really basic checking function so we can have
// determinable example output.
checkHTML := processors.NewFuncTransformer(func(d data.JSON) data.JSON {
output := "Got HTML?\n"
if strings.Contains(strings.ToLower(string(d)), "html") {
output += "YES\n"
} else {
output += "NO\n"
}
output += "HTML contains Google Search?\n"
if strings.Contains(string(d), "Google Search") {
output += "YES\n"
} else {
output += "NO\n"
}
return data.JSON(output)
})
stdout := processors.NewIoWriter(os.Stdout)
pipeline := ratchet.NewPipeline(getGoogle, checkHTML, stdout)
err = <-pipeline.Run()
if err != nil {
fmt.Println("An error occurred in the ratchet pipeline:", err.Error())
}
// Output:
// Got HTML?
// YES
// HTML contains Google Search?
// YES
}