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add http support for imports #233 #241

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41 changes: 37 additions & 4 deletions cmd/web3/flatten.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,9 @@ import (
"bufio"
"context"
"fmt"
"io"
"io/ioutil"
"net/http"
"os"
"path/filepath"
"strings"
Expand All @@ -25,8 +27,10 @@ func extractFilePath(line string) string {
line = strings.Replace(line, "\"", "", 2)
line = strings.Replace(line, "'", "", 2)
line = strings.Replace(line, ";", "", 2)
line = strings.TrimSpace(filepath.Clean(line))
return line
if strings.HasPrefix(line, "http") {
return line
}
return strings.TrimSpace(filepath.Clean(line))
}

func loadAndSplitFile(imports map[string]importRec, fileName string) (name string, newFiles bool, openZeppelinVersion, pragma string, err error) {
Expand Down Expand Up @@ -54,8 +58,37 @@ func loadAndSplitFile(imports map[string]importRec, fileName string) (name strin
}
if strings.HasPrefix(line, "import") {
noImports = false
fpath := thisPath + "/" + extractFilePath(line)
fname := filepath.Base(fpath)
fpath := ""
fname := ""
fullFilePath := extractFilePath(line)
if strings.HasPrefix(fullFilePath, "http") {
var resp *http.Response
var out *os.File
fname = filepath.Base(fullFilePath)
resp, err = http.Get(fullFilePath)
if err != nil {
return
}
if resp.StatusCode != 200 {
err = fmt.Errorf("%s: %s", fullFilePath, resp.Status)
return
}
defer resp.Body.Close()
out, err = os.Create(fname)
if err != nil {
return
}
defer out.Close()
_, err = io.Copy(out, resp.Body)
if err != nil {
return
}
fpath = thisPath + "/" + fname
} else {
fpath = thisPath + "/" + fullFilePath
fname = filepath.Base(fpath)
}

if !imports[fname].Created {
newFiles = true
imports[fname] = importRec{
Expand Down