6d3a4f1db8
When preparing a tutorial for netxlite, I figured it is easier to tell people "hey, this is the package you should use for all low-level networking stuff" rather than introducing people to a set of packages working together where some piece of functionality is here and some other piece is there. Part of https://github.com/ooni/probe/issues/1591
82 lines
2.6 KiB
Go
82 lines
2.6 KiB
Go
package main
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import (
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"fmt"
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"reflect"
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"strings"
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"time"
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)
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func (d *Descriptor) genNewResponse(sb *strings.Builder) {
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fmt.Fprintf(sb,
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"func (api *%s) newResponse(ctx context.Context, resp *http.Response, err error) (%s, error) {\n",
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d.APIStructName(), d.ResponseTypeName())
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fmt.Fprint(sb, "\tif err != nil {\n")
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fmt.Fprint(sb, "\t\treturn nil, err\n")
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fmt.Fprint(sb, "\t}\n")
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fmt.Fprint(sb, "\tif resp.StatusCode == 401 {\n")
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fmt.Fprint(sb, "\t\treturn nil, ErrUnauthorized\n")
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fmt.Fprint(sb, "\t}\n")
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fmt.Fprint(sb, "\tif resp.StatusCode != 200 {\n")
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fmt.Fprint(sb, "\t\treturn nil, newHTTPFailure(resp.StatusCode)\n")
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fmt.Fprint(sb, "\t}\n")
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fmt.Fprint(sb, "\tdefer resp.Body.Close()\n")
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fmt.Fprint(sb, "\treader := io.LimitReader(resp.Body, 4<<20)\n")
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fmt.Fprint(sb, "\tdata, err := netxlite.ReadAllContext(ctx, reader)\n")
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fmt.Fprint(sb, "\tif err != nil {\n")
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fmt.Fprint(sb, "\t\treturn nil, err\n")
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fmt.Fprint(sb, "\t}\n")
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switch d.ResponseTypeKind() {
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case reflect.Map:
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fmt.Fprintf(sb, "\tout := %s{}\n", d.ResponseTypeName())
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case reflect.Struct:
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fmt.Fprintf(sb, "\tout := &%s{}\n", d.ResponseTypeNameAsStruct())
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}
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switch d.ResponseTypeKind() {
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case reflect.Map:
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fmt.Fprint(sb, "\tif err := api.jsonCodec().Decode(data, &out); err != nil {\n")
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case reflect.Struct:
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fmt.Fprint(sb, "\tif err := api.jsonCodec().Decode(data, out); err != nil {\n")
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}
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fmt.Fprint(sb, "\t\treturn nil, err\n")
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fmt.Fprint(sb, "\t}\n")
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switch d.ResponseTypeKind() {
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case reflect.Map:
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// For rationale, see https://play.golang.org/p/m9-MsTaQ5wt and
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// https://play.golang.org/p/6h-v-PShMk9.
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fmt.Fprint(sb, "\tif out == nil {\n")
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fmt.Fprint(sb, "\t\treturn nil, ErrJSONLiteralNull\n")
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fmt.Fprint(sb, "\t}\n")
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case reflect.Struct:
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// nothing
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}
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fmt.Fprintf(sb, "\treturn out, nil\n")
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fmt.Fprintf(sb, "}\n\n")
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}
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// GenResponsesGo generates responses.go.
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func GenResponsesGo(file string) {
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var sb strings.Builder
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fmt.Fprint(&sb, "// Code generated by go generate; DO NOT EDIT.\n")
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fmt.Fprintf(&sb, "// %s\n\n", time.Now())
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fmt.Fprint(&sb, "package ooapi\n\n")
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fmt.Fprintf(&sb, "//go:generate go run ./internal/generator -file %s\n\n", file)
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fmt.Fprint(&sb, "import (\n")
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fmt.Fprint(&sb, "\t\"context\"\n")
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fmt.Fprint(&sb, "\t\"io\"\n")
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fmt.Fprint(&sb, "\t\"net/http\"\n")
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fmt.Fprint(&sb, "\n")
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fmt.Fprint(&sb, "\t\"github.com/ooni/probe-cli/v3/internal/netxlite\"\n")
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fmt.Fprint(&sb, "\t\"github.com/ooni/probe-cli/v3/internal/ooapi/apimodel\"\n")
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fmt.Fprint(&sb, ")\n\n")
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for _, desc := range Descriptors {
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desc.genNewResponse(&sb)
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}
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writefile(file, &sb)
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}
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