Merge pull request #42 from donutloop/feature/http_pretty_request_dump

add pretty print for http request

Author: Marcel Edmund Franke

debugutil/README.md

@@ -38,4 +38,28 @@ func main() {
     }    
     log.Println(s)
 }
+```
+
+PrettyRequestDump creates a human readable representation of the value http.Request.
+
+## Example 
+
+```go 
+package main 
+
+import (
+	"github.com/donutloop/toolkit/debugutil"
+	"log"
+	"net/http"
+)
+
+func main() {
+
+    req := &http.Request{}
+    s , err := debugutil.PrettySprintRequest(req)
+    if err != nil {
+        log.Fatal(err)
+    }    
+    log.Println(s)
+}
 ```

debugutil/http_dump.go

@@ -18,7 +18,7 @@ func PrettySprintResponse(resp *http.Response) (string, error) {
 	return string(dump), nil
 }
 
-// PrettyDumpResponse is like DumpResponse but dump is pretty formatted.
+// PrettyDumpResponse is like httputil.DumpResponse but dump is pretty formatted.
 func PrettyDumpResponse(resp *http.Response, body bool) ([]byte, error) {
 
 	b, err := httputil.DumpResponse(resp, body)
@@ -38,5 +38,37 @@ func PrettyDumpResponse(resp *http.Response, body bool) ([]byte, error) {
 		return buffer.Bytes(), nil
 	}
 
+	return b, nil
+}
+
+// PrettySprintRequest is pretty printing a http request
+func PrettySprintRequest(resp *http.Request) (string, error) {
+	dump, err := PrettyDumpRequest(resp, true)
+	if err != nil {
+		return "", err
+	}
+	return string(dump), nil
+}
+
+// PrettyDumpRequest is like httputil.DumpRequest but dump is pretty formatted.
+func PrettyDumpRequest(req *http.Request, body bool) ([]byte, error) {
+
+	b, err := httputil.DumpRequest(req, body)
+	if err != nil {
+		return nil, err
+	}
+
+	header := req.Header.Get("Content-type")
+	if body && strings.Contains(header, "application/json") && req.ContentLength > 0 {
+		buffer := new(bytes.Buffer)
+		jsonRaw := b[int64(len(b))-req.ContentLength:]
+		b = b[:int64(len(b))-req.ContentLength]
+		buffer.Write(b)
+		if err := json.Indent(buffer, jsonRaw, "", "\t"); err != nil {
+			return nil, err
+		}
+		return buffer.Bytes(), nil
+	}
+
 	return b, nil
 }

debugutil/http_dump_test.go

@@ -47,3 +47,28 @@ X-Xss-Protection: 1; mode=block
 
 	t.Log(s)
 }
+
+func TestPrettyDumpRequest(t *testing.T) {
+
+	b := []byte(`{"data": {"partner": {"verified_data": {"people": [{"identity_document_checks": [{"status": "passed", "file_links": [{"file_type": "photo", "link": "https://static.iwoca.com/assets/iwoca.4c17fef7de62.png"}], "check_id": "REFERENCE_0001", "datetime": "2017-06-12T14:05:51.666Z", "identity_document_type": "passport", "document_issuing_country": "gb", "provider_name": "test"}], "uid": "6cf7319e-f9ec-4038-ba4f-3561a6097484"}]}}, "state_key": "8e4db383-2ead-4a47-87df-220432714c47", "schema_version": "v1", "application": {"company": {"last_12_months_turnover": {"amount": 700000, "datetime": "2016-10-12T14:05:51.666Z"}, "type": "gmbh", "company_number": "01111112", "bank_details": {"iban": "DE89370400440532013000"}}, "requested_products": {"credit_facility": {"approval": {"amount": 15000}}}, "people": [{"residential_addresses": [{"town": "Ely", "uid": "cf9aa203-4e0c-4d7f-b42b-90c7b3d193d3", "house_number": "286", "date_from": "2014-02-03", "street_line_1": "Idverifier St", "postcode": "CB62AG"}], "last_name": "Norton", "uid": "6cf7319e-f9ec-4038-ba4f-3561a6097484", "roles": ["applicant", "shareholder", "guarantor", "director"], "title": "herr", "first_name": "Ervin", "privacy_policy": {"agreed": true, "datetime": "2016-10-12T14:05:51.666Z"}, "date_of_birth": "1980-01-01"}]}}}`)
+
+	req, err := http.NewRequest(http.MethodGet, "/api/resource", bytes.NewReader(b))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	req.Header.Set("Content-Type", "application/json")
+
+	req.ContentLength = int64(len(b))
+
+	if req.ContentLength != 1288 {
+		t.Logf("content length of request body is bad, %v", req.ContentLength)
+	}
+
+	s, err := debugutil.PrettySprintRequest(req)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	t.Log(s)
+}