mirror of https://github.com/node-red/node-red.git
46 lines
2.4 KiB
HTML
46 lines
2.4 KiB
HTML
<!--
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Copyright JS Foundation and other contributors, http://js.foundation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<script type="text/html" data-help-name="tcp in">
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<p>Provides a choice of TCP inputs. Can either connect to a remote TCP port,
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or accept incoming connections.</p>
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<p><b>Note: </b>On some systems you may need root or administrator access
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to access ports below 1024.</p>
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</script>
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<script type="text/html" data-help-name="tcp out">
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<p>Provides a choice of TCP outputs. Can either connect to a remote TCP port,
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accept incoming connections, or reply to messages received from a TCP In node.</p>
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<p>Only the <code>msg.payload</code> is sent.</p>
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<p>If <code>msg.payload</code> is a string containing a Base64 encoding of binary
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data, the Base64 decoding option will cause it to be converted back to binary
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before being sent.</p>
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<p>If <code>msg._session</code> is not present the payload is
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sent to <b>all</b> connected clients.</p>
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<p><b>Note: </b>On some systems you may need root or administrator access
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to access ports below 1024.</p>
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</script>
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<script type="text/html" data-help-name="tcp request">
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<p>A simple TCP request node - sends the <code>msg.payload</code> to a server tcp port and expects a response.</p>
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<p>Connects, sends the "request", and reads the "response". It can either count a number of
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returned characters into a fixed buffer, match a specified character before returning,
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wait a fixed timeout from first reply and then return, sit and wait for data, or send then close the connection
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immediately, without waiting for a reply.</p>
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<p>The response will be output in <code>msg.payload</code> as a buffer, so you may want to .toString() it.</p>
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<p>If you leave tcp host or port blank they must be set by using the <code>msg.host</code> and <code>msg.port</code> properties in every message sent to the node.</p>
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</script>
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