Mercurial > hg > nginx-site
annotate xml/en/docs/faq/variables_in_config.xml @ 2361:7d1f8b1896b8
nginx-plus-r18 promo.
author | Maxim Konovalov <maxim@nginx.com> |
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date | Tue, 09 Apr 2019 14:29:20 +0000 |
parents | 764fbac1b8b4 |
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1 <!-- |
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2 Copyright (C) Nginx, Inc. |
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3 --> |
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4 |
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5 <!DOCTYPE article SYSTEM "../../../../dtd/article.dtd"> |
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6 |
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7 <article name="Is there a proper way to use nginx variables to |
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8 make sections of the configuration shorter, |
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9 using them as macros for making |
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10 parts of configuration work as templates?" |
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11 link="/en/docs/faq/variables_in_config.html" |
589 | 12 lang="en" |
13 rev="1"> | |
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14 |
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15 <section> |
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16 |
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17 <para> |
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18 <initial>Q:</initial> |
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19 Is there a proper way to use nginx variables to make sections of |
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20 the configuration shorter, using them as macros for making |
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21 parts of configuration work as templates? |
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22 </para> |
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23 |
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24 <para> |
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25 |
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26 </para> |
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27 |
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28 <para> |
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29 <initial>A:</initial> |
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30 Variables should not be used as template macros. Variables are |
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31 evaluated in the run-time during the processing of each |
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32 request, so they are rather costly compared to plain static |
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33 configuration. Using variables to store static strings is also |
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34 a bad idea. Instead, a macro expansion and "include" directives |
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35 should be used to generate configs more easily and it can be |
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36 done with the external tools, e.g. sed + make or any other |
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37 common template mechanism. |
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38 </para> |
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39 |
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40 </section> |
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41 |
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42 </article> |