Because the cas login page requires a verification code, there was no problem debugging Google Chrome at first, but because it needs to be compatible with IE, the verification code was not displayed when debugging under IE, but there was data in the interface data, but later it was discovered that the Content-Type was
image
/ png causes no problem in Google, but it cannot be displayed in IE, so when the background needs to return the Content-Type format, the image/jpeg
image comes out.
ah. . . . . . It’s another day of trouble.
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