Last night, when I was doing something I was interested in, I found that the browser alarm failed to decode downloaded font and OTS parsing error: failed to convert * * * font to * * *.

However, I have never encountered this problem. After looking for the answer on the Internet for a while, I found a similar question. Some netizens guessed that the interceptor failed, so I checked Shiro’s interception configuration:

<property name="filterChainDefinitions">
       <value>
                /=authc
                /index=authc
                /logout=logout
                /assets/** = anon
                /css/** = anon
                /fonts/**=anon
                /img/**=anon
                /**= user
       </value>
</property>

But this configuration is theoretically OK, so it’s not this problem.

After consulting some materials today, we found the possible reasons:

When Maven’s filter parses the font file, it destroys the binary file format of the font file, resulting in browser parsing errors.

The solution is: the font file does not need a filter, so we need to set it in the configuration (springboot is written in pom.xml):

<build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
        <resources>
            <!-- fonts file cannot use filter as the data structure of byte file will be changed via filter -->
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
                <excludes>
                    <exclude>static/fonts/**</exclude>
                </excludes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>false</filtering>
                <includes>
                    <include>static/fonts/**</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
        </resources>
    </build>

After the configuration shown above, Maven does not parse the font file when compiling the project, the browser will not give an alarm, and the font can be displayed normally.