# FastAPI and friends newsletter

<iframe data-w-type="embedded" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="https://xr4n4.mjt.lu/wgt/xr4n4/hj5/form?c=40a44fa4" width="100%" style="height: 800px;"></iframe>

    </jsp:include>

    <main class="content-wrapper position-relative">
        <iframe class="w-100 h-100 position-absolute" style="border: 0;"
                src="<%=request.getContextPath()%>${serverPath}<%= response.encodeURL("/_plugin/kopf/") %>"
                title="<la:message key="labels.dashboard_plugin" />"></iframe>
    </main>

    <jsp:include page="/WEB-INF/view/common/admin/footer.jsp"></jsp:include>
</div>

		</postConstruct>
		<postConstruct name="put">
			<arg>"//AREA"</arg>
			<arg>"href"</arg>
		</postConstruct>
		<postConstruct name="put">
			<arg>"//FRAME"</arg>
			<arg>"src"</arg>
		</postConstruct>
		<postConstruct name="put">
			<arg>"//IFRAME"</arg>
			<arg>"src"</arg>
		</postConstruct>
		<postConstruct name="put">
			<arg>"//IMG"</arg>
			<arg>"src"</arg>
		</postConstruct>

SS=!!c(a,"article,aside,dialog,figcaption,figure,footer,header,hgroup,main,nav,section{display:block}mark{background:#FF0;color:#000}template{display:none}")),l||i(a,d),a}var k,l,m="3.7.3",n=a.html5||{},o=/^<|^(?:button|map|select|textarea|object|iframe|option|optgroup)$/i,p=/^(?:a|b|code|div|fieldset|h1|h2|h3|h4|h5|h6|i|label|li|ol|p|q|span|strong|style|table|tbody|td|th|tr|ul)$/i,q="_html5shiv",r=0,s={};!function(){try{var a=b.createElement("a");a.innerHTML="<xyz></xyz>",k="hidden"in a,l=1==a....

        }

        // Write a frame.
        val length = (end - start).toInt()
        outputStream.write(outBytes, start.toInt(), length)

        // If the last frame was truncated, immediately close the connection.
        if (truncated) {
          socket.close()
        }
      } else {
        // read a frame
        val inFrame = InFrame(i, reader)
        reader.nextFrame(false, inFrame)

Blocking APIs may be inefficient because you hold a thread idle while waiting on the network. Threads are expensive because they have both a memory overhead and a context-switching overhead.

#### Framed protocols

			return frame
		}
	}

	return runtime.Frame{}
}

// FileWithLineNum return the file name and line number of the current file
func FileWithLineNum() string {
	// Keep FileWithLineNum one frame outer than CallerFrame to preserve pre-v1.31.1 semantics.
	frame := callerFrame(4)
	if frame.PC != 0 {
		return string(strconv.AppendInt(append([]byte(frame.File), ':'), int64(frame.Line), 10))
	}

	return ""
}

	if strings.Contains(buf.String(), "gorm/logger/slog.go") {
		t.Error("Found internal slog.go reference in caller frame. Expected only test file references.")
	}

	if !strings.Contains(buf.String(), "gorm/logger/slog_test.go") {
		t.Error("Missing expected test file reference. 'gorm/logger/slog_test.go' should appear in caller frames.")
	}

```
$ adb shell setprop log.tag.okhttp.Http2 DEBUG
$ adb shell setprop log.tag.okhttp.TaskRunner DEBUG
$ adb logcat '*:E' 'okhttp.Http2:D' 'okhttp.TaskRunner:D'
```

### HTTP/2 Frame Logging

This logs inbound (`<<`) and outbound (`>>`) frames for HTTP/2 connections.

```
[2020-01-01 00:00:00] >> CONNECTION 505249202a20485454502f322e300d0a0d0a534d0d0a0d0a
[2020-01-01 00:00:00] >> 0x00000000     6 SETTINGS

  /** Byte 0 reserved flag 3. Must be 0 unless negotiated otherwise. */
  internal const val B0_FLAG_RSV3 = 16

  /** Byte 0 mask for the frame opcode. */
  internal const val B0_MASK_OPCODE = 15

  /** Flag in the opcode which indicates a control frame. */
  internal const val OPCODE_FLAG_CONTROL = 8

  /**
   * Byte 1 flag for whether the payload data is masked.
   *
   * If this flag is set, the next four